Do Fungal Infections Cause Hair Loss?

  • Medically reviewed by: Dr. Anil Simhadri
  • Written by: William Hartfield
  • Last updated: 19/12/2023

If you are suffering from a fungal infection that is causing hair loss or making you worried about losing hair, then you need to take immediate action to stop the infection spreading.

This article will teach you about the different types of infection. You will also learn steps you can take to rid your scalp of fungus and even regrow your hair.

What Are Fungi?

A man with a fungal infection on his scalpFungi (singular fungus) are eukaryotic single-celled or multinucleate organisms that decompose and absorb the organic material in which they grow. They include yeasts, mushrooms, molds, smuts, rusts, and mildews.

Hair infection by fungal agents is scientifically known as trichomycosis. The study of fungal hair infections has gained importance over the last couple of years due to the following reasons:

  • Human trichomycosis is a major concern due to cosmetic hair loss
  • Severe infection by fungi can cause inflammation which may result in disability
  • Vellus hair infection in other parts of the body other than the scalp may cause chronic recurrent infections that can make life difficult for victims

How Many Types of Fungal Infections Can Cause Hair Loss?

Fungal infections that cause hair loss can be broadly categorized into three main types. These are:

  • Dermatophytes
  • Malassezia spp
  • Agents causing piedra


Dermatophytes directly invade the hair where they can inhabit the scalp and grow. Their ability to inhabit and grow on the hair can be demonstrated by the hair bait technique.

This involves placing sterile hair in a container with soil, where the Dermatophytes present in the soil show their affinity for hair by immediately evading it and producing colonies using hair as a substrate.

Some Dermatophytes can also produce perforating organs in the hair shaft.

How Do Dermatophytes Invade Human Hair?

Dermatophytes invade the hair stratum corneum, elongate and multiply, and then enter into the hair cortex as intrapilary hyphae. The hyphae cannot go beyond the keratogenous zone of the hair and remain there in the form of a fringe called Adomson’s fringe.

It is within the keratogenous zone that hypha produces spores that appear as crusted plaque-like lesions on the scalp.

Fungal Infection Due to Dermatophytes:

Tinea Capitis

Tinea capitis is the most common fungal infection of the scalp, which is also called ringworm. Though the condition usually attacks children between five to 10 years, it is present across all age groups especially in males.

A woman presenting with tinea capitis

Is Tinea Capitis Associated With Worms?

Contrary to popular belief, tinea capitis has nothing to do with worms but it is a fungal infection caused by dermatophytes in the Trichophyton and Microsporum genera. Other fungi that are linked to tinea capitis are Microsporum gypseum, which uses animals as hosts.

The term “ringworm” was first used to describe hair conditions that assumed a “ring form” in the early part of the 16th century. According to the World Health Organization, tinea capitis accounts for more than 90% of fungal infections in Europe and the Americas.

Is Tinea Capitis Contagious?

The disease easily spreads when one has physical contact with an infected person, especially contact with the hair. The reason the condition is so prevalent among children is that children are generally very close and tend to have a lot of physical contact with each other, especially while at school.

What Are the Risk Factors for Tinea Capitis?

  • Sharing hair shave blades with a large number of people in pilgrimage centers, mostly in unhygienic conditions
  • Sharing of fomites like combs, towels, hairbrushes, and theater seats with infected persons
  • Physical contact with pets that serve as habitats for zoophilic (animal) dermatophytes
  • Having wet hair for long periods. Fungi thrive best under moist conditions
  • Major/minor scalp injuries


  • Round bald patches on the scalp
  • Severe itching of the scalp
  • Brittle, broken hairs that are shorter than the rest
  • The bald patches may appear red and scaly in serious cases
  • Bald patches may blister and ooze
  • Gray patches
  • Thickened boggy swellings, especially in adults

How to Distinguish Between Tinea Capitis and Other Scalp Conditions

Most scalp conditions are associated with similar symptoms, which makes it difficult to identify a particular condition just by taking a look at the affected hair and scalp.

Although an experienced dermatologist may be able to easily diagnose ringworms, the best approach involves scraping the affected area with a blunt scalpel. The harvested hairs are subjected to microscopic viewing. The presence of spores is considered a positive diagnosis.

Tinea Capitis Treatment

(1) Topical treatment:

Topical treatments applied in the right amounts have been found to effectively get rid of ringworms. They include shampoos containing:

It is important to note that topical treatment by itself is not considered to be sufficient. However, any commercial shampoo that contains 0.02 parts of ketoconazole is very effective.

The shampoo should be used for a period of up to 8 weeks. Topical treatment has been very successful, especially in children.

(2) Systemic Treatment:

Systemic treatment is often required to cure tinea capitis within the shortest time possible. The drug most commonly used in this category is Griseofulvin. Physicians recommend doses of 10-20 mg/kg.

Just like with topical treatments, Griseofulvin should be used for a minimum of eight weeks, though your physician may dictate otherwise depending on the severity of your infection. There are two main reasons why Griseofulvin is the most preferred systemic drug:

  • It is the only licensed drug, besides being easily available in most dermatological clinics
  • It can be converted into a syrup, perfect for children

However, Griseofulvin is gradually being replaced by more recent, safer options because of the following reasons:

  • It must be taken for relatively long periods compared to more recent options
  • The drug is not appropriate for pregnant women
  • It has its side effects that can cause additional stress and social disruption among users

The other systematic treatments that have been introduced include:

  • Terbafine – Besides being associated with less severe side effects, terbafine only needs to be applied for up to 4 weeks. These factors have elevated it above griseofulvin in terms of effectiveness. The recommended dosage is 5 mg/kg of body weight.
  • Fluconazole – It is given in the dosage of 6 mg/kg body weight and treatment takes just 4 weeks

Among all the drugs looked at, Griseofulvin remains the only licensed drug.

What Can Be Done to Minimize the Risk of Tinea Capitis?

  • It is imperative to avoid sharing items like combs, hairbrushes, and clothing even if no one has been infected by tinea capitis in your family.
  • Pets like cats and dogs serve as hosts to ringworm-causing fungi and should therefore be kept clean at all times.
  • Avoid sharing hairbrushes and combs with anybody suffering from a fungal infection
  • You should purpose to wash your hair with the approved shampoos at all times. They contain ingredients that can kill most fungi.

Malassezia Infections

Malassezia spp. are lipophilic yeasts that derive their name from their discoverer, Malassez, who successfully isolated them from dandruff in 1889. They have been found to play an important role in the pathogenesis of pityarisis capitis, a mild form of seborrheic dermatitis of the scalp that accounts for 75-85% in seborrheic individuals.

There is also definite evidence that Malassezia can cause hair loss and exacerbate androgenic alopecia. A simple mechanism would be to increase chronic inflammation in the scalp. Treating with ketoconazole helps eliminate dandruff and reduce hair loss.


Currently, there are 12 known species of Malassezia:

  • Pachydermatis
  • Furfur
  • Globosa
  • Restricta
  • Obtuse
  • Slooffiae
  • Sympodialis
  • Dermatis
  • Equi
  • Nana
  • Yamatoensis
  • Japonica

Pachydermatis is the only non-lipid dependent species with all the others being lipid dependent. The main fungal condition in this category is pityriasis capitis, commonly known as dandruff.

Pityriasis Capitis

Molecular Studies have suggested M. globosa as the most common pathogen responsible for pityriasis capitis.

Dandruff manifests itself as itchy, reddish-brown patches on the scalp. Statistics collected by the National Institute of Health indicate that pityriasis capitis has a worldwide prevalence of between 2% and 5%.

Large numbers of Malassezia yeasts invade hair follicles distended with keratin. Confirmation of an attack by pityriasis capitis can be done by experienced dermatologists. Demonstration of spores in the scalp is considered confirmatory.

Special stains are used to visualize the spores. These include Periodic acid schiff’s or Gomari’s methane amine silver stains.

Does Pityriasis capitis/Dandruff attack both Men and Women equally?

Though the condition affects both sexes, it is more prevalent in men and usually attacks them soon after puberty. Dandruff scalps lose two to three times more hair than non-dandruff scalps.

Risk Factors for Pityriasis capitis/Dandruff:

  • Extreme weather
  • Poor hair hygiene
  • Stress and fatigue
  • Recovery from cardiovascular conditions like heart attack or stroke
  • Age- the condition usually sets in after puberty
  • Having a very oily scalp – a moist environment provides M globosa with the perfect ground for multiplication and growth

What Are the Symptoms of Pityriasis capitis?

  • Itching followed by scratching hence hair loss
  • Flaky white or yellowish scales in the hair and areas next to the hair, like shoulders
  • A scaling rash on the scalp
  • In serious cases, red patches may develop on the scalp

Pityriasis Capitis Hair Loss Treatment

Treatment of pityriasis capitis mainly involves the use of anti-dandruff shampoos that contain active ingredients such as:

  • Zinc pyriothine
  • azole antifungals,
  • coal and tar
  • Selenium sulfide

In addition, effective topical treatment may include lotions, terbinafine, mousses containing azoles, ciclopiroxolamine, and buteneafine. If the condition is very serious, systemic antifungal agents must be combined with one of the various azoles like ketoconazole, itraconazole, and fluconazole.

To date, the mainstay dandruff treatment is ketoconazole 2% shampoo: It persists in the hair for up to 72 hours after application and is safer in infants. Other studies have proposed a combination of 2% ketoconazole with 1% Zinc pyriothine to be a very effective treatment.


Piedra is a Spanish word meaning stone. The condition is characterized by black and white nodules located near the base of the hair follicles. In serious cases, the hair breaks into small bits. It was first described by Biegel in 1865, and has been classified into two types:

  • Black piedra: This type thrives best in tropical conditions. It is caused by a fungus called piedraia hortae. Its unique symptoms include:
  • Dark, stony nodules at the base of the hair
  • In severe cases, a metallic sound is produced by the nodules during normal combing of the hair.
  • White piedra: It is caused by a species of fungus known as Trichosporon beigelli. Unlike black piedra, white piedra can attack other haired areas of the body, not just the scalp. The disease has been diagnosed around the pubic area in both men and women. It’s unique symptoms are:
  • creamy whitish nodules located at the base of the hair follicles
  • Hair on the affected section of the scalp appears shorter and brittle

There are two main favorable factors for piedra infection:

  • Applying plant oils on wet or semi-dry hair
  • High humidity

How is Piedra Diagnosed?

Under black piedra, diagnosis is considered positive if brown spores are found in the hair. Mature nodules have eight visible ascopores characterized by the presence of a flagellum at each tip.

On the other hand, a positive diagnosis for white piedra is confirmed if the hair contains groups of spores located on the affected area of the scalp. The spores can have varying sizes.

Treatment of Piedra

Topical application of terbinafine, azoles, and tolnaftate can be effective in curing fungal infections. Your physician should be in a position to recommend the most appropriate choice.

Black piedra can be successfully cured by oral usage of terbinafine. On the other hand, oral itraconazole provides an effective treatment of white piedra. Physicians may also advise you to clip the affected hair to facilitate the penetration of drugs into the scalp. You should also avoid moisture as much as possible.

Homemade Remedies for Fungal Hair Infections

Besides topical and systemic treatments, several homemade solutions are equally effective in treating and/or avoiding fungal infections. We now discuss the main ones:

Castor Oil

Castor seeds and oil in a wooden bowlApplying castor oil all over the scalp can treat and reduce fungal infections. You should note that for efficacy, castor oil needs to be applied regularly as it is not a quick fix.

You should avoid applying the oil directly on the affected area with your bare hands. Instead, use latex gloves for this purpose. Be sure to rinse off all the oil after 15 minutes. You should ensure that all hair strands are washed properly with plenty of cold water.

The reason why you should remove all the oil is that an oily scalp is itself a favorable factor for fungal infections. You should always remember fungi thrive well under oily, moist conditions

Anti-fungal Shampoos

Shampoos containing zinc pyrithione and selenium sulfide are also effective fungal treatments. You should apply the shampoo and then embark on massaging the hair strands and the scalp.

Remember to give the scalp a gentle touch to avoid scratching off the already loose hairs or causing injury to the scalp. 5 to 8 minutes are considered enough for this form of therapy, although the time spent in this exercise might depend on the extent of infection.

Again, anti-fungal shampoos do not offer you a quick fix and hence should be applied regularly until the infection is secured. Preventive use can be less frequent.

Tea Tree Oil

Tea tree oil can help reduce fungal infections on the scalpApplying tea tree oil is also an effective anti-fungal solution. A mixture of tea tree oil, grapes, and black walnut should be applied to the hair daily and can be allowed to remain for up to six hours.

The important thing is to give the ingredients ample time to penetrate the scalp. As such, you should avoid disturbing the hair during this period.

At the end of the exercise, be sure to rinse the hair with cold water. You should then use a towel to drain out the water because it’s imperative to have your hair as dry as possible.

Quick Tips For Getting Rid Of Fungal Infections From The Inside Out

Optimizing your diet is practically the only long-term solution to regrowing lost hair caused by fungal infections. The first thing you can do is to remove any yeasty foods from your diet. This includes:

  • Alcohol
  • Bread
  • Anything fermented
  • Mushrooms

Also, remove any processed carbohydrates from your diet. These typically ferment in the stomach causing a host of other problems.

Ideally, follow the rules of food combination when eating meals. This means your food will digest much more easily. Take a good probiotic and learn how to get a better balance of good and bad bacteria in your gut.


As you have have seen from the research data above, fungal hair infections are real and cause hair loss. Dermatophytes and Malassezia spp. could be considered the main causes of fungal infections compared to piedra.

In most cases, these infections do not directly cause hair loss: It is the intense itching and irritation that may tend to force you to scratch your hair.

Diagnosis of all these infections should involve a dermatologist as some of the symptoms appear across the board, therefore making it quite difficult to identify and confirm a particular infection by just physical inspection.

Apart from clinical treatment, there are several homemade solutions that you can turn to that can help you fight fungal infections.

Information contained on this website has not been evaluated by any medical body such as the Food & Drug Administration. All information is for educational purposes only. We do not aim to diagnose, treat, cure or prevent any disease or illness. You must consult a medical professional before acting on any content on this website.