Small bumps on the face may be caused by acne, eczema, hidradenitis suppurativa, flat warts, folliculitis and other diseases. 1. Acne: Acne is a chronic inflammatory skin disease, also known as pimples, which tends to occur on the face, resulting in localized pimples and inflammatory papules. 2. Eczema: Eczema has complex triggers that lead to inflammation of the superficial layers of the dermis and epidermis. If it occurs on the face, it may lead to localized pimples, papules, and small bumps on the face, accompanied by obvious itching. 3. Sweat duct tumor: Sweat duct tumor is a benign tumor of the skin, mostly seen in women, preferably occurring on the face, especially around the eyelids is the most common. It causes localized skin color, yellowish or yellowish-brown, semicircular and flat papules. 4. flat warts: flat warts, if occurring in the face, resulting in the local appearance of viral benign superfluous organisms, considered related to human papillomavirus infection. 5. Folliculitis: Folliculitis is caused by bacterial infection, resulting in swelling of the hair follicles and the tissues around the follicles, localized single or multiple red pimples, can occur in the face. It is recommended to pay attention to facial hygiene, good skin care, to the hospital dermatology examination, but also targeted to give drugs to regulate.