Armpit long red ringworm need to be treated by medication, general measures and other ways. 1. medication: patients need to use local clotrimazole ointment, miconazole ointment and other azole antifungal drugs under the guidance of the doctor. For patients with large lesions, oral erythromycin, doxycycline and other antibiotics should be taken as prescribed by the doctor. 2. General measures: patients need to keep the armpits dry and clean, pay attention to hygiene, and take a bath often. It is recommended to wear loose, breathable clothing to reduce the friction of the underarm skin and avoid skin damage. When checking out the armpit long red ringworm, patients need to strengthen the daily life management, timely to the hospital, cooperate with the doctor active treatment, so as to avoid aggravation of the condition.