Keratosis pilaris, also called keratosis pilaris, is a chronic skin disease that occurs in hair follicles, mostly in children and adolescents, and often worsens in winter. The cause is mostly genetic and is also associated with thyroid insufficiency and vitamin A deficiency. The keratinized follicular skin is often located on the upper arms and thighs, often bilaterally, and the affected skin may appear as small keratinized papules with sebum and follicular epithelial cells on top of the papules. When the papules are small, they appear as small black dots, while when they are large, they appear as one small spine, often densely fused, in large papular patches. When the affected area is touched, there may be a filing sensation. Patients often describe the follicles of the affected skin as if there are vellus hairs that do not grow out. However, the patient is neither painful nor itchy, and there are no serious adverse consequences, but the damaged skin can affect the aesthetics and comfort. Some patients may also develop white papules inside the mouth; red and white spaced lines may also appear on the nails. Prevention and treatment Patients can reduce the occurrence of this condition by taking better care of their skin, keeping it clean and exfoliating it in a gentle way. During the dry winter months, the skin loses more water and is more susceptible to the disease. Therefore, it is not advisable to bathe too often in winter, and it is not advisable to use too many alkaline toiletries. After bathing, apply oil with skin care effect to protect the softness of the skin. In addition, applying sunscreen and taking vitamin C orally can also reduce the recurrence of this disease. You can consume foods rich in vitamin A in your diet, such as carrots, green vegetables, and fresh fruits. Patients can use topical medications to apply to the affected area, commonly used are 10% urea lipids, which can soften the keratosis pilaris and restore the lubrication of the skin. In addition, 0.1% vitamin A acid cream or 20% cod liver oil ointment, etc., can also relieve the dryness of the skin and have a role in keeping the skin lubricated. If you want to get a complete treatment, fruit acids and fractional laser resurfacing are good treatments.