How is your mother feeling?
I think she is having back pain. Low back pain, the most common musculoskeletal condition, is responsible for the loss of 17 million work days per year in the United States and ~$60 billion of the annual U.S. health care budget.
I think her symptoms would be Low back discomfort/pain, Stiffness and Numbness.
Her signs would be Paravertebral muscle spasm, Motor weakness, Loss of deep tendon reflexes, Loss of sensation, Clonus and Positive Babinski sign.
Most patients with low back pain can be treated non-operatively with short-term bed rest in the supine position, NSAIDs, and physical therapy to improve muscle strength of the lower back.
Surgical treatment is rare: Only 1 to 2% of back pain sufferers are candidates.
Prolonged bed rest is not beneficial; the patient may have 2 to 3 days of bed rest after the incident of back pain.
During the initial period of severe spasm and pain (usually 2 to 7 days), patients may have restricted mobility.
If plain radiographs are normal, patients should be mobilized progressively with physical therapy and aerobic conditioning.
Keep me informed if you have any queries.