Tea tree oilcan be used in shampoos and other hair products.
It also helps relieve symptoms of hair and scalp ailments like dandruff and head lice.
This article describes the benefits and uses of tea tree oil for hair.

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The oil helps keep your hair healthy and moisturized, supporting hair growth.
However, no scientific evidence exists that tea tree oil alone can promote hair growth.
Treat Dandruff
Dandruff is typically sparked by a yeast calledMalassezia spp.

Tea tree oil has antifungal and antimicrobial properties that fight this yeast.
Relieve Scalp Eczema
Atopic dermatitis (eczema)can make your scalp dry and itchy.
Hirsutism is excessive hair growth on the face and body of females in areas typically seen in males.
Research indicates that eucalyptus oil has many of the same antimicrobial antifungal properties.
When using shampoo or conditioner containing tea tree oil, follow product directions.
Tea tree oil manufacturers warn against applying tea tree oil directly to the scalp.
This is because the oil is very concentrated and is likely to irritate your skin.
It should not be swallowed.
Most people do not react to the topical program of tea tree oil when used as directed.
Before using tea tree oil on your scalp, test a small amount on the inside of your arm.
If you do not have a skin reaction after 24 hours, it is likely safe to use.
There is little information on the safe use of tea tree oil while pregnant or breastfeeding.
Consult your healthcare provider before using tea tree oil during either of these conditions.
Tea Tree Oil Hair Treatment Ingredients
Not all tea tree oil products are the same.
Terpinen-4-ol is the ingredient that provides natural antiseptic properties in tea tree oils.
This can cause a decrease in quality.
Exposure to light also increases levels of para-cymene in tea tree oil, which could lead to skin irritation.
However, many people agree that it is indeed beneficial in sustaining hair brilliance.
Summary
Tea tree oil is an essential oil used to treat many skin problems and infections.
When used to enhance or treat the hair and scalp, it is applied as an ingredient in shampoo.
Using tea tree oil alone can increase your risk of rash because the oil is highly concentrated.
Tea tree oil poses the risk of severe effects when taken orally.
Research on tea tree oil for hair is somewhat limited.
Its antibacterial and antifungal properties are valuable in fighting dandruff and head lice.
It also may help relieve symptoms of itching that come with scalp eczema.
Consult your healthcare provider about other safety concerns or if you notice a skin rash from using it.
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