Regular exercisers should expect their muscles to feel sore on the day after they exercise intensely, but if the soreness doesn’t go away, they need a medical evaluation.

When you exercise vigorously, your muscles are injured. Muscle biopsies taken on the day after intense exercise show bleeding into the muscle fibers and disruption of the Z-bands that hold muscle fiber filaments together as they slide by each other. The soreness you feel should disappear within 48 hours, and with the most severe workouts, it should certainly disappear within a week or two. If the soreness remains after a few weeks, you should check with your doctor. You may have an infection anywhere in your body,/ an autoimmune disease such as arthritis/ or other conditions. Some doctors call chronic muscle soreness fibromyalgia, chronic fatigue syndrome or multiple chemical sensitivities. These diagnoses are really an admission by the physician that he hasn’t the foggiest idea of the cause. There are no laboratory tests and no specific signs and symptoms to establish a firm diagnosis. Hidden infections re often a cause. There are reports of people with muscle pain and normal liver tests having hepatitis C which can be effectively treated with interferon injections. If you also have urinary symptoms, you may have a venereal disease caused by mycoplasma which can be cured with the antibiotics clarithromycin or azythromycin. You could have Lyme disease spread by a tick bite or a type of arthritis. If you have chronic muscle pain, don’t accept a diagnosis of chronic fatigue syndrome, fibromyalgia or multiple chemical sensitivity until you have am evaluation for a hidden infection, autoimmune disease or tumor which my be treatable.