Causes of neck pain include: 1  Abnormalities in the bone or joints. 2  Trauma. 3  Poor posture.  Degenerative 1  diseases. Tumors.  Muscle strain.
1 Repetitive, excessive sports, especially in the form on running, can lead to trauma that creates leg pain - E.G: shin splints and stress fractures. 2  Leg pain with an underlying medical cause may be nerve-related, musculoskeletal or vascular.  Some forms of leg pain resolve with self-help care.
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.