| Medical Condition | Uses based on scientific evidence | Grade* |
| candidiasis of mouth | in laboratory studies, tea tree oil has been shown to kill fungus and yeast such as candida albicans . however, at this time, there is not enough information available from human studies to make recommendations for or against this use of tea tree oil. tea tree oil can be toxic when taken by mouth and therefore should not be swallowed. | c |
| chronic gingivitis, plaque induced | study results on the effects of tea tree oil mouthwash on gum inflammation and plaque are mixed. further research is needed before a strong conclusion can be drawn. | c |
| contact dermatitis and other eczema unspecified cause | early small studies show that tea tree oil applied to this skin may reduce histamine-induced inflammation. further research is needed to confirm these results. | c |
| dermatophytosis of foot | early studies report that tea tree oil may have activity against several fungal species. however, at this time there is not enough information to make recommendations for or against the use of tea tree oil on the skin for this condition. | c |
| dermatophytosis of nail | although tea tree oil is thought to have activity against several fungus species, there is not enough information to make recommendations for or against the use of tea tree oil on the skin for this condition. | c |
| genital herpes | laboratory studies show that tea tree oil has activity against some viruses, and it has been suggested that a tea tree gel may be useful as a treatment on the skin for genital herpes. however, there is currently not enough information to make a recommendation for or against this use of tea tree oil. | c |
| methicillin resistant staphylococcus aureus | laboratory studies report that tea tree oil has activity against methicillin-resistant staphylococcus aureus (mrsa). it has been proposed that using tea tree oil ointment in the nose and a tea tree wash on the body may treat colonization by these bacteria. however, there is currently not enough information from human studies to make recommendations for or against this use of tea tree oil. | c |
| other acne | although available in many products, little information is available from human studies to evaluate the benefit of tea tree oil used on the skin for the treatment of acne. tea tree oil may reduce the number of inflamed and non-inflamed lesions. | c |
| other seborrheic dermatitis | early research reports that the use of 5% tea tree oil shampoo on mild-to-moderate dandruff may be effective and well tolerated. further research is needed to confirm these results. | c |
| other symptoms involving head and neck | tea tree oil is used in mouthwash for dental and oral health. however, there is currently insufficient evidence in humans to recommend for or against this use of tea tree. tea tree oil can be toxic when taken by mouth and therefore should not be swallowed. | c |
| pediculosis unspecified | early studies have found that tea tree alone or in combination with other agents may be effective against lice. however, large, well-designed trials are still needed before a strong recommendation can be made. | c |
| purulent endophthalmitis unspecified | early studies found that tea tree oil helped rid the eye area of the mite infection caused by ocular parasitic mites. large, well-designed clinical trials are needed before a strong recommendation can be made. | c |
