Red spots all over the body like prickly heat may be perifollicular keratosis, eczema, cherry angioma and other diseases. 1. Keratosis pilaris: the cause is not clear, it may be related to heredity, metabolic disorder, endocrine, vitamin deficiency and other factors. Patients may develop small red or normal-skinned papules, which can lead to red spots all over the body like prickly heat. 2. Eczema: the cause of the disease is not clear, may be related to immune abnormalities, heredity, hormone level changes and other factors. Patients will have localized erythema, papules, blisters and other symptoms, which can be seen in any part of the body surface. 3. Cherry angioma: the cause is not clear, may be related to aging, genetic mutation, mainly manifested as papules and nodules of different sizes, bright red or purple-red, can be distributed in all parts of the body. The red spots all over the body like prickly heat disease is more, it is recommended to go to the regular hospital to consult the examination, clarify the cause of the disease, with the doctor standardized treatment.