Sudden thigh muscle pain is not a precursor of cancer, but may be caused by rheumatic diseases, chronic joint strain, calcium deficiency, thigh muscle strain caused by over-exercise, etc. Sudden thigh muscle pain is recommended to go to a regular hospital for a detailed examination and symptomatic treatment. Generally, you can take anti-inflammatory and pain-relieving drugs, or treat by applying heat. Patients can apply hot compresses once a day for 20 minutes each time to promote blood circulation and relieve the condition. In addition, plaster can also play a very good treatment effect. The key is also to choose the right treatment method according to their actual situation. Patients need to adjust their mindset and develop good habits during the recovery period. They also need to strengthen nutrition, eat more calcium-containing foods, get more sunlight to replenish calcium, and also strengthen exercise to enhance body resistance.