Hard lumps on the face are mostly seen in folliculitis, acne, papular urticaria, nevus of sebaceous glands, sebaceous cysts and so on. 1. Folliculitis: Folliculitis is mostly related to bacterial infection, and can manifest as papules, pustules, nodules, cysts, and keloids. 2. Acne: The degree of acne varies, such as moderate and severe acne, which may form cysts and nodules. In addition to this, in patients with keloid, keloid or keloid scars are formed after acne, resulting in localized hard bumps. 3. Papular urticaria: Papular urticaria is mostly seen in mosquito bites leading to skin allergies, which can cause red, windswept pimples, itching and other symptoms. It may manifest as hard lumps. 4. Sebaceous nevus: It is a hyperplastic skin disease caused by abnormal sebaceous glands. After entering puberty, the skin lesions will proliferate and thicken, resulting in localized hard lumps. 5. Sebaceous cyst: Sebaceous nevus is related to the blockage of sebaceous ducts and the collection of secretions locally. The sebum gradually stagnates and forms a retention cyst, which is raised on the surface of the skin and has a relatively hard texture. To summarize, a variety of diseases may lead to hard lumps on the face, and it is recommended not to deal with them on your own, but to go to the dermatology department of the hospital to find the cause.