Stiffness of the waist may be caused by long-term strain, lumbar disc herniation, ankylosing spondylitis, etc. The methods to soften it mainly include lifestyle adjustment, physical methods and medication. 1. Long-term strain injury, aseptic inflammation: due to the lumbar stiffness caused by a long period of time, first of all, you need to correct the wrong posture, avoid sitting and standing for a long time, adjust the body posture appropriately, and wear a waist cushion to consolidate the muscle strength if necessary; secondly, you can choose heat therapy, massage, fascia gun and other ways to accelerate the lumbar muscle blood circulation and relieve the tension and fatigue of the muscles. 2. Lumbar disc herniation, ankylosing spondylitis: patients with lumbar herniation can take methylcobalamin orally to nourish the nerves; can also be static mannitol to quickly reduce the swelling; patients with obvious stiffness can also be taken orally to take ethylphenidate and other muscarinic drugs; patients with ankylosing spondylitis can choose to control inflammation by non-steroidal anti-inflammatory drugs and anti-rheumatic drugs, such as meloxicam tablets, lancets, etc. The above drugs should be used under the guidance of a doctor. The above drugs need to be used under the guidance of a doctor, avoid self-medication. The same symptom, different causes, different stages of the disease, different treatment methods, should be standardized under the guidance of doctors.