In preparing guidelines for dermatomycosis (tinea, trichophytia, dermatophytosis), we have primarily summarized the disease types and treatments as described in 4 textbooks used in Japan and abroad. We present our classification draft based on these following descriptions. In Japan, any dermatophytosis other than favus or tinea imbricata is considered to be tinea, while outside Japan, favus and tinea imbricata are also classified as tinea. Tinea capitis is classified together with trichophytia superficialis capillitii and kerion celsi, in a group that tends to include asymptomatic carriers. Most textbooks generally classify trichophytia profunda of the glabrous skin and granuloma trichophyticum as subtypes of tinea corporis. Tinea faciei can easily be misdiagnosed, but in many cases can be distinguished from tinea corporis by its specific clinical picture. Tinea unguium is regarded as one type of onychomycosis. We present a summary of dermatomycosis treatment as a proposal for future revision of the guidelines. One of the problems in the treatment of tinea capitis is that the safety of itraconazole (ITZ) and terbinafine hydrochloride (TBF) in children has not been established. Severity criteria for concomitant use of oral medications in the treatment of tinea pedis remains to should be established. Although many clinical studies concerning tinea unguium have been published, 3 of the 4 textbooks we consulted clearly stated that most of those studies were conducted by pharmaceutical companies. Further studies on the etiology and disease severity of tinea unguium are needed.