Bumps on the neck are caused by several reasons: i. Sebaceous cysts, which protrude from the surface of the skin and do not cause discomfort, when infection occurs, local redness, swelling and pain can occur, and the radical cure is surgical removal. II. Enlarged lymph nodes, which can be clearly felt by touch as small bumps with tough texture, smooth to the touch, and good mobility, and can be painful when pressed, are caused by inflammatory invasion, and the enlarged lymph nodes will disappear after the inflammation subsides. Persistent enlarged lymph nodes require further examination in hospital to clarify whether there is malignancy. Third, thyroid nodules, which are asymptomatic when they are small, may cause pressure symptoms when they are relatively large.