What causes red pimples on the forehead?

Red pimples on forehead may be folliculitis, acne, atopic dermatitis, eczema and other skin diseases.
1. Folliculitis: a skin disease caused by bacteria, fungi and other infections of hair follicles and surrounding tissues, the main bacteria are Staphylococcus aureus, Staphylococcus epidermidis Malassezia and so on. It is characterized by red papules with pressure pain.
2. Acne: a chronic inflammatory disease of the sebaceous glands of the hair follicles, which can be manifested as blackheads, whiteheads, red inflammatory pimples.
3. Allergic dermatitis: after local contact with sensitizers, red spots and red papules may appear on the skin, accompanied by itching.
4. Eczema: infants and young children are prone to eczema on the face, manifested as red papules, papules or blisters, accompanied by itching.
Red pimples on forehead are recommended to go to the hospital dermatology department.