Eight lines on forehead are related to subcutaneous tissue atrophy, muscle contraction, etc. Eight lines can be categorized into dynamic eight lines and static eight lines, and the methods of removing them include injection, photoelectricity treatment and surgical treatment. 1. Dynamic Eight Lines: Dynamic Eight Lines patients are relatively mild and the lines are not particularly deep. They can be treated with injections of botulinum toxin type A, hyaluronic acid, etc., which will help to lift up the skin in the depressed area and make the skin full and flat. 2. Static eight lines: For static eight lines, excess fat can be sucked from thighs and other parts of the body, and then injected into the lines after special treatment to fill the lines. For very severe cases, the lines can be removed by surgically removing part of the muscle. It is recommended that patients with forehead lines should consult a doctor in time and take appropriate treatments in strict accordance with the doctor’s instructions.