4 months baby chicks skin with pimples may be circumcision, diaper dermatitis and other causes. 1. foreskin scale: in general, the infant foreskin tends to be longer, sebum secretion tends to accumulate between the foreskin and the glans, if the cleaning is not timely or thorough, easy to form foreskin scale, so that the baby chickenskin appeared in the size of a grain of rice goosebumps. 2. diaper dermatitis: if the baby failed to change diapers or diapers, the skin for a long time by the urine, feces stimulation, easy to cause diaper dermatitis, good in the buttocks, genitals, lower abdomen and upper thighs, manifested as the surface of the skin pimples, erythema, blisters and other symptoms. 4 months baby chicks skin with pimples, there may be other causes (such as folliculitis, etc.), it is recommended to go to the hospital in a timely manner to improve the examination, to clarify the cause of the disease to give targeted treatment.