Causes of neck pain include: 1  Abnormalities in the bone or joints. 2  Trauma. 3  Poor posture.  Degenerative 1  diseases. Tumors.  Muscle strain.
1 Pain in the legs may be due to injury or inflammation of any of the structures that are found in the leg, including bones, joints, muscles, tendons, ligaments, blood vessels, nerves, and skin. Inflammation of tissue is usually the cause of pain.  Pain can also radiate from other parts of the body and be felt in the leg. Back ailments can cause pain and numbness of the leg. Abdominal aorta and iliac artery aneurysms can also present with leg pain. A blood clot in the large veins located in the abdomen, pelvis, or legs is another cause of leg symptoms.
1 In fact, dysfunction of any gland or system in your body can lead to achy legs, as legs support your body throughout the day and are most strained in any kind of activity. 2  Sciatica: The inflammation of sciatic nerve which gives rise to a condition called sciatica, is a common cause of severe pain in legs. Inflammation of the tendons near joints like heel or knee, due to rheumatoid arthritis or diabetes can lead to pain in the joints and muscles. 2  Arthritis or gout can lead to inflammation of any joint in the leg and can be the cause of severe pain.