The causes of leg pain include muscle cramps, injury, nerve damage, inflammation and atherosclerosis, states MedlinePlus. Arm injury, muscle sprain or strain, rheumatoid arthritis, heart attack, and fibromyalgia may result in arm pain, according to the Mayo Clinic.
Muscle cramps may occur due to use of diuretics or statins, deficiency of certain minerals in the body, or dehydration, according to MedlinePlus. Extreme exercises or use of muscles may cause muscle fatigue, resulting in leg pain. Tendinitis, shin splints, stress fracture and muscle strain may cause injury, leading to the problem.
Varicose veins, deep vein thrombosis, and infection of the bone, skin or soft tissue may lead to leg pain, explains MedlinePlus. Rarely, leg pain may occur as a result of sciatic nerve pain, or cancerous or noncancerous bone tumor. Legg-Calve-Perthes disease, which is cessation or slow growth of the leg due to insufficient blood flow, may result in the problem. Enough rest, ice application, massage and over-the-counter pain killers may aid in alleviating the pain.
A broken wrist or arm, a dislocated elbow, tennis elbow or a herniated disk may cause arm pain, explains the Mayo Clinic. Angina, ulnar nerve entrapment, bursitis, cancer and cervical spondylosis may also lead to the problem. Other causes of arm pain include carpal tunnel syndrome, thoracic outlet syndrome, tendinitis, and De Quervain's tenosynovitis, which is inflammation of tendons in the thumb that affect the wrist. A person who experiences unexpected, severe pain in the arm, back or shoulder, or swelling in the arm should seek immediate medical attention.