Postpartum neck lines can be eliminated by hyaluronic acid injection, botulinum toxin injection, and photoelectric treatment. 1. Hyaluronic acid injection: Hyaluronic acid is injected as a filler material into the area where neck lines appear, which can make the neck skin firm and elastic, and can effectively remove neck lines. At present, it is commonly used in clinic as Hi Body. 2. Botulinum toxin injection: Botulinum toxin is dispersed and injected evenly into the cervical broad muscle, which can inhibit muscle contraction by blocking the conduction between the nerve and the muscle, so as to achieve the effect of reducing and removing the neck lines. 3. Photoelectric treatment: through fractional laser, radio frequency, electroporation, etc., it is the use of laser’s photothermal effect or the heat energy generated by electromagnetic wave to activate and reconstruct the skin collagen, which has the effect of lifting and removing wrinkles, so as to achieve the purpose of removing neck wrinkles. There are more ways to eliminate postpartum neck lines, so it is recommended to go to a regular medical institution and choose the appropriate way to eliminate them under the guidance of a specialist.