Hi welcome to HCm I can understand your concern regarding your son s back muscle pain one after another . Muscle aches are extremely common. Almost everybody has likely experienced discomfort in his or her muscles at some point. There can be several factors causing it -- Overuse of muscles , lack of physical activity and lack of proper intake of essential nutrients , lack of sleep . Often, this is because most instances of myalgia result from too much stress, tension, or physical activity. Some common causes include: over stretching the muscles ,avoiding high-impact activities until after the weight-lifting sessions until the muscle pain is resolved Taking proper rest and right balanced diet including fiber , vitamins ,minerals ,protien ,antioxidants -ginger , garlic, lemon juice , Aloe vera , turmeric powder with milk in proper proportion . All this will help boost immunity increase resistance from diseases . Incorporate a warm-up and a cool-down into all of your exercise sessions. Stay hydrated, . Engage in regular exercise to help promote optimal muscle tone. Get up and stretch regularly if you work at a desk or in an environment that puts you at risk for muscle strain or tension. The following can be a sign of a medical emergency. Get to the hospital as soon as possible if you experience any of the following along with aching muscles: Some medical factors for myalgia include: hypothyroidis fibromyalgia infections, such as the flu lupus Your sore muscles might be due to something other than tension and physical activity. In this case, your doctor will best be able to advise you on how to fully resolve your muscle pain . Hope this helps solves your query .Take care , All the best . Don t hesitate to get back if have any further query