Dense bumps on forehead allergies may be caused by acne, eczema, contact dermatitis and other diseases, which can be improved by general treatment, medication and physical therapy. 1. Acne: For forehead bumps caused by acne, you need to pay attention to skin cleansing and adjust the diet structure. Patients follow the doctor’s instructions to use topical adapalene gel, tazarotene and other retinoids, which have the effect of dissolving acne, but the drug has the risk of teratogenicity. Patients can also cooperate with the use of photodynamic therapy, through red and blue light irradiation to reduce the inflammatory response. 2. Eczema: For forehead bumps caused by eczema, it is necessary to get rid of allergens and avoid scratching the affected area. At the same time, also follow the doctor’s instructions to apply tacrolimus ointment, pimecrolimus cream and other calcium-modulated neural phosphatase inhibitors, with anti-inflammatory effect. 3. Contact dermatitis: forehead allergy with dense goose bumps may be caused by contact dermatitis, need to look for sensitizers, clear allergens. And follow the doctor’s instructions to apply hydrocortisone cream, dexamethasone cream and other glucocorticoid ointment, antibacterial, anti-allergic and anti-inflammatory effect. Or oral antihistamine drugs, such as loratadine, ebastine and so on. There are many causes of allergies on the forehead with dense small bumps, it is recommended that patients go to the hospital to clarify the cause of the disease, and cooperate with the doctor for standardized treatment.