Muscles tenderness can occur due to a direct blow to the muscle, a muscle strain, or from certain muscular conditions. A direct blow to the area can cause prolonged tenderness and inflammation as the body heals. A muscle strain may cause tenderness at the location of injury. It may hurt more when you move or when pressure is placed on it.
Conditions that cause muscular tenderness include fibromyalgia, chronic fatigue syndrome, myofascial pain syndrome, or illnesses, such as the flu, lupus, or lyme disease. Fibromyalgia is a condition where you experience increased sensitivity to pain. You may have trigger points that are sensitive and tender to the touch. In chronic fatigue syndrome, achy muscles and joints is a common symptom. This symptom may also appear as muscle tenderness. Myofascial pain syndrome is another pain condition where muscular tenderness may appear.
Your muscles may also become tender from intense activity. This tenderness is caused by your body’s natural healing mechanisms. When you do an intense workout, small micro-tears are created in the muscle tissue. When you rest, your body works to repair these tears. This can cause soreness or tenderness in spots.