Leg pain refers to any kind of pain that occurs between the heels and the pelvis. There are many reasons for leg pain, and not all of them are caused by a problem that originates in the leg; some injuries or spinal problems can cause aches and pains in the leg(s).
Leg pain can be long-term, transitory, intermittent, acute, or slowly progressive. Pain may affect just part of the leg, such as the knee, or the whole limb. Leg pain may be felt as tingling, sharp, dull, an ache, or a stabbing sensation.
Some leg pains may be just a nuisance, in some cases the cause may never be found, other leg pains may be a sign of a more serious disease or condition, even a life-threatening one.