Lips a turn over a lot of small particles commonly sebaceous ectasia, this disease is sebaceous gland misplaced growth in the lip mucosa, the formation of a common chronic sebaceous gland disease without conscious symptoms. Clinical manifestations of isolated, pinhead-sized yellowish or whitish slightly elevated pimples, the number of variable, can be single, can also be sparsely distributed, touch a rough feeling, no self-conscious symptoms. It is a physiological variant of sebaceous gland development, the etiology of which is unknown and may be the result of abnormal ectopic sebaceous glands in the embryonic period. Because of the more frequent onset before and after puberty, it is thought to be related to the endocrine stimulation of puberty, and it is also thought to be a local stimulation or trauma that makes the sebaceous glands appear proliferative changes, with a high prevalence in patients who smoke. The disease does not require treatment; consider electrocoagulation or liquid nitrogen cryotherapy if necessary.