The most commonly diagnosed medical syndromes include chronic fatigue syndrome, carpal tunnel syndrome and restless leg syndrome, according to MedicineNet. In restless leg syndrome, or RLS, the patient suffers pain in his legs that is relieved by moving them around. This happens when the patient is at rest.
Chronic fatigue syndrome is characterized by extreme tiredness, pains in the muscles and joints, headache and a general feeling of malaise after exercise that lasts more than a day, explains MedlinePlus. Carpal tunnel syndrome is a disorder where the patient experiences numbness and tingling in her hand or arm, states Mayo Clinic. Its cause is a compressed nerve in the carpal tunnel, which is a narrow channel in the wrist.