A lot of white dots on the chin may be fatty grains, acne and sebaceous residues, which are generally related to improper skin cleaning, long-term late-night and other bad habits. 1, fatty grains: the formation of fatty grains may be related to a weak skin barrier, prolonged UV exposure, skin damage, etc. They can usually disappear on their own after a few days and are not harmful to human health. For people with high aesthetic requirements, they can be treated with sterilized acne needles and disinfected with iodophor on local tissues to avoid infection; 2. Acne: white dots may be caused by closed mouth acne breaking through the stratum corneum, which may be related to the consumption of spicy food, staying up late, etc. For the treatment of acne, you can follow medical advice to apply topical vitamin A acid cream, salicylic acid ointment, etc.; 3, sebaceous gland residue: human facial skin has sebaceous glands, usually due to improper cleaning, there may be dust, cosmetic residue, plus the secretion of sebum, easy to block the pores, forming white dots. Usually no special intervention is needed, just pay more attention to cleaning and adjusting the water-oil balance. For white dots on the chin, you can first observe, and pay attention to clean face, strengthen sun protection, avoid staying up late, if the dots gradually reduce or even disappear, then do not care. If the number of white dots is more, accompanied by pain, redness and other manifestations, you can go to the hospital dermatology department to clarify the cause of the disease, so as to further treatment.