Itching on both sides of the lower body in men may be a common bacterial infection causing folliculitis, or it may be a fungal infection causing ringworm, and it is best to collect local skin secretions for culture to clarify the type of disease-causing microorganism before selecting targeted medication. If it is caused by a common bacterial infection, erythromycin ointment or fusidic acid cream can be applied for 5-7 days and the symptoms can be effectively relieved. If the ringworm is caused by a fungal infection, you need to select anti-fungal creams such as ketoconazole ointment and clotrimazole ointment for symptomatic treatment for 1-2 weeks, and you need to take oral anti-fungal medications such as fluconazole capsules and itraconazole capsules for symptomatic treatment in order to get effective relief from the symptoms. Before the symptoms are completely healed, you should avoid spicy and stimulating diet, do not drink alcohol and do not have sex.