Itchy skin between the cleavage may be prickly heat, contact dermatitis, intertriginous rash, etc. It can be relieved by changing underwear and medication. 1. Prickly heat: If the underwear is tight and made of poor material, coupled with high outside temperatures, this situation will affect the sweat discharge and cause prickly heat. You should choose loose, comfortable clothing to avoid localized pressure, and apply peppermint glycerite lotion, mometasone furoate gel and other medications if the symptoms are more pronounced. 2. Contact dermatitis: If the material of the underwear is not good, or some people have allergic reaction to the iron ring in the underwear area, it will lead to local erythema and itching and other symptoms, you should keep the local skin breathable and clean, change the underwear. When the symptoms are obvious, you can apply compound flumethasone, hydrocortisone and other glucocorticoid drugs. 3. Friction rash: the skin folds of the skin in close contact with each other will produce friction, this time if the long-term in a high temperature or humid environment, will lead to sweat retention to produce impregnation, local irritation caused by inflammation appeared friction rash. Local oozing is obvious when you can use boric acid solution and other wet compresses, topical glucocorticoid drugs to promote the inflammation subside. Usually need to pay attention to local clean and dry. Itchy skin between the cleavage should be to find the cause, symptomatic treatment, the above drugs need to be used in accordance with medical advice.