The middle of the breast is the sunken crevice between the two sides of the breast, the cleavage, its depth is often related to the size of the breast, the larger the breast the deeper the cleavage, the smaller the breast the shallower the cleavage, the breast skin and chest skin rich in sweat glands. When wearing tight and breathable underwear or weather skin temperature is too high, can cause the sweat glands to secrete a lot of sweat accumulation in the cleavage, the phenomenon of cleavage sweating, mainly to reduce body temperature, as a normal physiological phenomenon, may not be special treatment. It is important to note that if there is too much sweat in the cleavage, it should be washed in time to avoid causing skin eczema or other dermatological diseases, while replacing loose, breathable cotton underwear.