What should I do if the tendon at the back hurts when I straighten my leg?

For pain in the back of the leg upon straightening, a comprehensive approach involving rest, physical therapy, medication, and medical evaluation should be adopted to alleviate pain and promote recovery. 1. Rest and Adjustment: Ensure adequate rest and avoid high-intensity exercise or activities to reduce further irritation to the leg muscles. 2. Physical Therapy: Engage in appropriate muscle relaxation exercises, such as yoga or tai chi, for at least 30 minutes daily to relieve muscle tension. 3. Medication: If the pain is severe, nonsteroidal anti-inflammatory drugs (NSAIDs), such as ibuprofen sustained-release capsules or celecoxib capsules, may be taken under a doctor's guidance to inhibit prostaglandin synthesis and reduce pain. 4. Medical Evaluation: If the above measures fail to relieve the pain or if symptoms continue to worsen, prompt medical consultation and examination are recommended to identify the underlying cause and receive targeted treatment.