Yellow hard grains, shaped like insect eggs, are usually considered to be particles formed by the accumulation of sebum in local hair follicles, mostly appearing after squeezing closed pimples, and can be removed by using mild cleansing products to remove excess oil and avoid causing pore blockage. In some people, the sebaceous glands may secrete a lot of sebum, or the skin may be oily due to spicy or greasy food, or lack of water. The sebaceous glands of the hair follicles secrete a lot of sebum, which causes keratinization and narrowing of the hair follicles, and the sebaceous glands have obstacles to excretion. In addition, there may be some shed keratinocytes mixed with them, or dust and other substances inside the hair follicle. The acne pits left after squeezing are prone to infection, and bacterial infection can easily lead to folliculitis, which manifests as single or multiple red papules, and may produce pustules on top. Therefore, when pimples appear on the face, it is recommended not to squeeze or pick them on your own to avoid infection of the affected area triggering folliculitis. You can apply topical vitamin A acid cream and adapalene gel for relief. You should maintain good daily habits, avoid staying up late, over-eating spicy and stimulating food, balance the diet structure, and actively exercise. You can use mild cleansing products to clean up the pores and improve the yellow hard grains that appear due to the blockage of hair follicles caused by skin oil.