Hot water bath private parts become itchy, may be allergic to toiletries, or cholinergic urticaria, can be used externally to stop itching drugs, hormone ointment or oral antihistamines. 1. Allergy to toiletries: topical, oral medications and physical therapy together. Choose itch-relieving, less irritating topical preparations such as glycerite lotion, ethanol preparations containing peppermint, or use immunosuppressants such as tacrolimus or short-term topical glucocorticosteroids such as dexamethasone cream to relieve the symptoms. At the same time, antihistamines such as loratadine and vitamin C can be taken; at the same time, certain physical therapy such as phototherapy can be used. 2. Cholinergic urticaria: when heat or exercise and other cholinergic nerve excitation, erythema, doughnut with itching, should be used locally mometasone furoate cream and other anti-inflammatory treatment, if necessary, oral antihistamine drugs such as loratadine. When the intimate parts of the itch should be timely to go to the hospital to identify the causes and targeted treatment, to prevent the aggravation of discomfort affecting the quality of life.