Head long meat grain in general is mainly caused by diseases, common diseases include lipoma, sebaceous cysts, seborrheic keratosis and so on. 1. Lipoma: Lipoma is a benign soft tissue tumor composed of mature fat cells, obesity, heredity and other factors may induce the production of lipoma. Patients with lipoma often present with one or more lumps on head, face, limbs, etc. The lumps are soft and easy to push. 2. Sebaceous cysts: Sebaceous cysts are benign lesions in which sebum accumulates to form cysts. When sebaceous glands secrete too much cortex, which leads to the blockage of follicular glands, sebum accumulates to form cysts. Patients may have smooth surface and clear boundary lumps on the head and face. 3. Seborrheic keratosis: Seborrheic keratosis is a common benign tumor, also known as senile warts and age spots. The incidence of this disease is gradually increasing with age and skin aging. Patients often present with plaques and papules of varying sizes on the head and face, which can be accompanied by painful itching. When patients experience discomfort, they should immediately go to the hospital for treatment.