Face full of dense small bumps may be related to acne, contact dermatitis, etc., resulting in the need for targeted medication under the guidance of a doctor. 1. Acne: Acne is a chronic inflammatory disease of the sebaceous glands of the hair follicles, which occurs on the face and can appear as pimples, papules, pimples and other damage. It can be treated by applying medicines such as retinoic acid cream, adapalene gel and benzoyl peroxide as prescribed by the doctor. 2. Contact dermatitis: contact dermatitis is generally caused by contact with irritants or allergens caused by skin inflammation, can appear pinpoint size, dense distribution of pimples, can be accompanied by itching, burning, pain and other symptoms. Topical calcineurin inhibitors, such as tacrolimus ointment and pimecrolimus cream, may be prescribed if necessary. This symptom alone is not enough to diagnose the disease, do not rule out that it is caused by other factors, it is recommended that the patient promptly consult a doctor to clarify the cause of the disease and give targeted treatment.