What causes weak and sore knees with no strength?

The knee may refer to the knee joint. Acidic, weak, and powerless sensations in the knee joint could be caused by intense exercise, overexertion, calcium deficiency, osteoarthritis of the knee, rheumatoid arthritis, or other reasons. It is recommended to seek medical attention promptly, identify the underlying cause, and receive symptomatic treatment under the guidance of a qualified physician. Specific analyses are as follows:

1. Intense Exercise

After a prolonged period without physical activity, suddenly engaging in intense exercise may lead to wear and tear of the knee joints, resulting in symptoms such as soreness, weakness, and fatigue. It is advisable to gradually increase exercise intensity and avoid sudden vigorous activities.

2. Overexertion

Excessive loading on the knee joint or activities such as deep squatting may lead to excessive accumulation of lactic acid around the knee joint, potentially causing the aforementioned symptoms. Generally, symptoms tend to improve after adequate rest, so there is no need for excessive concern.

3. Calcium Deficiency

This may be related to picky eating habits or irregular meal patterns. When the body experiences significant calcium deficiency, it can easily lead to osteoporosis, which in turn causes soreness, weakness, and fatigue in the knee joint, possibly accompanied by muscle cramps. Patients are advised to take medications such as calcium carbonate tablets, calcium pantothenate tablets, or calcium lactate tablets as directed by a physician.

4. Knee Osteoarthritis

This condition may be associated with degenerative changes in cartilage, synovial membranes, and other structures within the knee joint. After onset, patients may experience knee pain; if stress on the knee joint increases, feelings of soreness and weakness may occur, along with limited mobility. Patients should follow medical advice and use medications such as celecoxib capsules, glucosamine sulfate tablets, or diclofenac sodium gel as prescribed.

5. Rheumatoid Arthritis

This may be linked to factors such as living in damp environments or pathogenic infections. Once developed, the disease may affect the synovium and cartilage within the joints, leading to the above-mentioned symptoms and possibly accompanied by joint swelling. Patients are advised to use medications such as Qingpeng ointment, diclofenac sodium sustained-release tablets, or methylprednisolone tablets as directed by their doctor.

In daily life, patients are encouraged to consume more calcium-rich foods such as dried shrimp, eggs, and milk. They should also maintain warmth and avoid staying in cold, damp environments, which can help alleviate discomfort symptoms.