The phenomenon of long red pimples on the forehead may be caused by folliculitis, prickly heat, eczema and other factors, and can be relieved by anti-infective drugs, glycerite lotion, glucocorticoids and other drugs. 1. Folliculitis: this is mainly caused by infection with Staphylococcus aureus, so there will be follicular pimples on the forehead area, through the external use of fusidic acid, mupirocin and other anti-infective ointment treatment, so as to improve the patient’s symptoms. 2. prickly heat: mainly occurs in the hot summer, can be caused by sweat duct blockage, often have localized red pimples accompanied by itching symptoms, can be applied with topical glycerite lotion, can play a role in relieving itching. 3. Eczema: may be due to contact with allergen factors, so the formation of forehead long red pimples symptoms, can cooperate with the doctor to choose hydrocortisone cream, mometasone furoate cream and other glucocorticosteroid medication, if necessary, can be combined with oral antihistamines such as loratadine. There may be other reasons for the red papules on the forehead, you need to cooperate with the doctor to improve the examination to determine the cause and then do the treatment, avoid blindly using drugs to avoid adverse effects.