Deep prickly heat, also known as deep corn rash, is a kind of prickly heat, which is caused by high temperature and high humidity, poor sweat excretion is retained in the skin, resulting in blockage of sweat gland ducts and then rupture to irritate the surrounding skin and cause periprotic inflammation, most commonly seen in severe and recurrent prickly heat in children. It increases in size after sweat stimulation, and when punctured, there is a clear flow of slurry. Because prickly heat can make the child’s skin prickly and itchy, irritable, sleepless, and more irritating when sweating or the environment temperature is too high, the child will cry and scream. If parents do not handle it properly, it can lead to infection, and in severe cases, sepsis can occur. So what are the reasons for prickly heat? The following is to tell you. 1, excessive sweating and poor evaporation, sweat impregnation of the skin, so that the epidermal keratin of the skin soaked soft and swollen, and then blocked the sweat gland holes. 2, when encountering cold stimuli, such as cold towels, head and neck, cold water bath, etc., sudden cold stimuli will make the sweat gland pores contraction, sweat is too late to discharge. 3, the skin is not clean, there are small traumas and breakage, can also make the sweat gland hole or sweat gland tube infection, resulting in sweat gland hole blockage. These three causes of blockage of the sweat gland pores, followed by sweat duct rupture, sweat leakage to the surrounding tissues, will cause inflammation, rash. When a child has a rash, such as prickly heat or sweat blisters, the surface of the skin is intact, and this is not a demanding time to choose skin care products for your child. However, when it comes to eczema, rough skin with small cracks or even oozing, skin care products should never be used casually.