Patients with dampness and itching on both sides of the crotch may be related to a variety of influencing factors. The first consideration is physiological, which may be related to the patient’s poor personal hygiene and failure to maintain a clean, dry local environment. It may also be related to the patient wearing clothing that is too tight or intolerant to clothing, which can usually be relieved with changes in daily lifestyle and requires no special treatment. However, if the condition is more pronounced and accompanied by symptoms, it may be related to pathological factors: 1. Tinea corporis: A fungal infection occurring on smooth skin, commonly in the groin and buttocks, that appears as a well-defined annular erythema with raised edges that may appear as papules, blisters, or scales. It may be accompanied by significant pruritus, especially in moist, sweaty areas, and has a tendency to recur. It is usually associated with obesity, excessive sweating, or other skin disease infections. 2. Corn rash: commonly known as prickly heat, it may be caused by a hot and muggy environment, where the patient’s crotch is closed by sweat pores resulting in sweat retention in the skin and moist itchy symptoms. White prickly heat is often manifested as transparent blisters, red prickly heat is often manifested as dense papules with a red halo, pus prickly heat or deep prickly heat, often accompanied by itching and burning sensation, scratching can lead to skin breakage and secondary infection, etc.; 3, between the rubbing dermatitis: general refers to the occurrence of superficial skin inflammation between the skin folds friction parts, the groin may be due to the crotch clothing friction skin, or sweating moisture and other reasons caused by local bacterial infection. It is often manifested as dampness with itching on both sides of the crotch, which may appear as well-defined bright red or dark red spots with a moist surface, and if left untreated may appear as papules, blisters, vesicles, exudation and other symptoms; 4. Herpes simplex: usually can be related to overexertion, fever, gastrointestinal dysfunction, menstruation, mood swings and other factors. There are usually no systemic symptoms and can occur on any part of the body, often with localized itching, burning, erythema or blisters of corn to green bean size, etc.; 5. Folliculitis: is a purulent infection that occurs in the hair follicles, more common, and the pathogenic bacteria is mainly Staphylococcus aureus. Usually due to the summer heat, the surrounding hair friction or sweat glands developed and other reasons leading to local inflammation of the hair follicles, early can be manifested as pinhead-sized red follicular papules, and then gradually become corn-sized pustules, surrounded by an inflammatory red halo. When patients have moist itching on both sides of the crotch, due to individual differences, it may also be affected by other disease factors, so they should pay attention to the care in daily life and seek medical treatment when necessary. In summer, when the weather is hot and muggy, patients should pay attention to keep the environment ventilated and at a suitable temperature, dress as generously as possible to avoid local friction, and keep the skin clean and dry. When the cause of the affected area is not clear, avoid using soap and hot water scrubbing to avoid stimulation.