Hard lumps in lumbar muscle strain may be caused by muscle spasm, edema or adhesion, which can be treated with oral muscarinic drugs, non-steroidal anti-inflammatory drugs or supplemented with massage and physical therapy. Lumbar muscle strain can be caused by localized acute injury, long-term poor posture or long-term high load injury. Acute injury can cause muscle edema, aseptic inflammatory response, muscle spasm and other pathological changes. 1. Muscle spasm: for acute or chronic lumbar muscle strain, there will be different degrees of muscle spasm, so you can feel the stiffness of the lower back, and the feeling of hard lumps locally. Oral muscarinic medication such as eperisone hydrochloride tablets and other drugs can be relieved. 2. Edema: acute lumbar muscle strain can be caused by inflammatory exudation of the strain local oozing swelling, can be touched hard lump-like low back muscles, but in most cases is not significant. Oral anti-inflammatory drugs can relieve inflammatory edema, such as diclofenac sodium, indomethacin, celecoxib and so on. It can also be treated with a combination of oral decongestive medications such as hepcidium saponin sodium tablets. 3. Adhesion: For long-term chronic lumbar muscle strain, local massage, high-frequency electrotherapy and other measures can be carried out to loosen the adhesive tissue. As the hard lump of lumbar muscle strain injury can be caused by many factors, so we need to consult the hospital to clarify the treatment under the guidance of the doctor.