Between the two chests is a place more likely to hide dirt than other parts, the more you scratch between the two chests, the more itchy, the first thing to consider is whether the itch is caused by local sweat or dirt, irritating the skin. Of course, it may also be a skin disease caused by more than itching. A, non-disease factors: women appear the symptoms, possibly because women usually have to wear bras, breathability is poor, in hot weather can be because of sweat stains accompanied by stuffiness and lead to itching. In addition, it may also be the skin between the two breasts by mosquito bites, frequent friction by clothing or often do not bathe more dirt, thus appearing the more scratching the more itchy the situation. Daily attention should be paid to personal hygiene, bathing, wearing loose and breathable clothing. The first is that the skin between the two chests may be exposed to certain allergens, or local humidity that leads to the growth of microorganisms that cause eczema. In addition to feeling itchy between the two chests, patients can also be accompanied by skin erythema, edema, papules, blisters and other symptoms. The first step is to remove the irritants, and then take oral medication or topical medication to relieve the symptoms; 2. Hives: hives can be induced by contact with allergens or physical or chemical stimulation between the two chests, in addition to itching can also be accompanied by wind clusters of varying sizes, generally after the removal of irritants itching can be reduced and the wind clusters can disappear. If the itching is severe and persists without relief, antihistamines can be used to stop the itching.