The following are some of the situations that are considered to be more and more serious: First, the topical drug used is not an antifungal drug for ringworm, such as the application of glucocorticoid ointment which leads to the occurrence of atypical ringworm and aggravates the fungal infection, at this time it is necessary to apply topical trimethoprim cream for application, which can be both antifungal and anti-allergic. Secondly, considering the presence of low immunity in patients with ringworm, such as combined malignancy or combined HIV infection, it is necessary to actively treat the primary disease at this time, along with oral itraconazole capsules or terbinafine hydrochloride tablets to strengthen the antifungal treatment.