Small white spots on the mouth a may be due to ectopic sebaceous glands caused by the sebaceous glands are usually distributed in the location of the chest and back, but the lips of the area is also a common part of the sebaceous gland ectopic proliferation, it will lead to the appearance of the lips of one or more, yellow-white, small, soft bumps, the disease does not affect the health of the people, and therefore do not need special treatment, but to avoid excessive friction on the lips. Small white spots on the lips, there may be suffering from chronic lipitis, it is often due to the lack of B vitamins, vitamin C and other trace elements in the body, for chronic lipitis patients will appear lips dry, cracked, flaky, bleeding, and even erosion, this patient should actively supplement the vitamins and trace elements in the lips coated with lip balm, to keep the lips moist, before leaving the house, to wear a mask. Wear a mask, and quit the bad habit of licking and biting lips.