Back pain in 90-year-old people may be osteoporosis, lumbar muscle strain, lumbar intervertebral disc herniation, etc. Depending on the cause of the disease, general treatment, physical therapy and medication can be taken to relieve it. 1. Osteoporosis: After the patient’s age gradually increases, the ability to absorb calcium decreases significantly, resulting in osteoporosis and back pain. It is recommended to take oral calcium gluconate tablets, calcium carbonate D3 tablets, blood circulation and pain relief capsules and other drugs to relieve pain. Daily bed rest, avoid lumbar stress activities, avoid lumbar cold. 2. Lumbar muscle strain: it is caused by chronic mechanical injury to the lumbar muscles, fascia, ligaments and other soft tissues, resulting in lumbar muscle strain to make the lumbar pain. It is recommended to use topical diclofenac diethylamide emulsion, piroxicam application for treatment; if the pain is severe, oral non-steroidal anti-inflammatory drugs, such as etoricoxib tablets, celecoxib capsules, rosoprofen sodium capsules and so on, can be used for treatment. 3. Lumbar disc herniation: disc degeneration is the root cause of lumbar disc herniation, and the patient’s herniated disc compresses the spinal nerve root, which may lead to the patient’s back pain. It is recommended to take ibuprofen extended-release capsules, relaxation tablets, methylcobalamin tablets and other drugs to relieve pain. Treatments such as lumbar hot packs, acupuncture, moxibustion and cupping can also be used to relieve back pain. 90-year-old elderly back pain may also exist other causes such as herpes zoster, urinary stones and lumbar vertebral fracture, tumors, etc., should be timely consultation, a clear diagnosis should follow the doctor’s instructions to actively cooperate with the doctor’s treatment, do not use their own medication, so as not to delay the condition.