The back feels like a lot of small particles and is not painful or itchy, which may be related to factors such as corns and keratosis pilaris.
1. Corns, also known as white acne and white moss, are benign retention cysts that occur in the epidermis and are mainly manifested as firm pimples. The face, cheeks, chest, back and forearms are the most common areas of corns, and there are no self-conscious symptoms.
2. Keratosis pilaris is a kind of keratinization abnormality skin disease with hair follicle as the center, mainly manifested as small papules around the hair follicle. The papules usually appear in patches and appear rough to the touch, similar to chicken skin-like changes. In addition to the aesthetic effect, there is no pain or itching.
Due to the diversity of clinical manifestations, a doctor’s consultation is required.