Severe discomfort in the joints of the legs and back can be due to causes like muscle strain, arthritis, vitamin D or calcium deficiency, or prolonged sitting or standing. You can take rest, apply warm compresses, do gentle stretching, and use mild pain relievers if needed. Ensure a healthy diet with enough calcium and vitamin D. If the pain is persistent, worsening, or associated with swelling or stiffness, consult a doctor for proper evaluation and treatment.

A deep ache in the left shoulder with normal movement is often due to muscle strain, poor posture, or overuse. Rest the shoulder, apply a warm compress, and do gentle stretching exercises; mild pain relievers can help if needed. Maintain proper posture, especially if you sit for long hours. If the pain persists, worsens, or is associated with chest pain, numbness, or weakness, seek medical advice promptly.