The yellow granules squeezed out of the pores may be the result of excessive secretion of sebaceous glands or inadequate cleaning, resulting in the accumulation of oil in the pores and the formation of sebum plugs, which may also be caused by cornea. 1, sebum plugs: commonly found in areas where the sebaceous glands secrete abundantly, such as the scalp, face, neck, chest and back, etc. After entering puberty, the androgen secretion of the youth group is strong, androgens can promote the secretion of sebaceous glands, prone to the formation of oil When squeezed out by hand, it is a yellow granular substance. Paying attention to facial cleaning can effectively reduce the formation of oil plugs; 2. cornus: it is a tiny cyst formed by the retention of epithelial keratin in the ducts of hair follicles, sebaceous glands and other skin appendages, which is manifested as a yellowish-white, solid papule, mostly found on the face, especially the skin under the eyelids, and patients generally have no obvious symptoms. When the papules are squeezed vigorously, white or pale yellow keratinous round particles can be extruded. Usually no treatment is needed. If it affects the aesthetics, the particles can be squeezed out or treated with laser therapy, etc.; 3. Other causes: such as blackheads, acne, folliculitis, etc., can also be squeezed out with yellow granular material. Daily attention needs to be paid to skin cleansing and moisturizing, and if the symptoms are severe, corresponding medication can also be administered under the guidance of a doctor.