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Definition

  • Pain in the legs (hip to foot)
  • Includes hip, knee, ankle, foot and toe joints
  • Includes minor muscle strain from overuse
  • Muscle cramps are also covered
  • The pain is not caused by an injury

Causes

  • Main Causes. Muscle spasms (cramps) and strained muscles (overuse) account for most leg pain.
  • Muscle Cramps. Brief pains (1 to 15 minutes) are often due to muscle spasms (cramps).  Foot or calf muscles are especially prone to cramps that occur during sports. Foot or leg cramps may also awaken your child from sleep. Muscle cramps that occur during hard work or sports are called heat cramps. They often respond to extra fluids and salt.
  • Muscle Overuse (Strained Muscles). Constant leg pains are often from hard work or sports. Examples are running or jumping too much. This type of pain can last several hours or up to 7 days. Muscle pain can also be from a forgotten injury that occurred the day before.
  • Growing Pains. 10% of healthy children have harmless leg pains that come and go. These are often called growing pains (although they have nothing to do with growth). Growing pains usually occur in the calf or thigh muscles. They usually occur on both sides, not one side. They occur late in the day. Most likely, they are due to running or playing hard. They usually last 10 to 30 minutes.
  • Low Calcium Level. Low calcium and vitamin D levels can cause minor bone pains. Pain is mainly in the legs and ribs. Children on a milk-free diet are at risk.
  • Osgood Schlatter Disease. Pain, swelling and tenderness of the bone (tibia) just below the kneecap. The patellar tendon attaches to this bone. Caused by excessive jumping or running. Peak age is young teens. Harmless and goes away in 1 - 2 years.
  • Viral Infections. Muscle aches in both legs are common with viral illness, especially influenza.
  • Serious Causes. Fractures, deep vein thrombosis (blood clot in leg). Also, neuritis (a nerve infection) and arthritis (a joint infection).
  • Septic Arthritis (Serious). A bacterial infection of any joint space is a medical emergency. The symptoms are severe joint pain, joint stiffness and a high fever.
  • Toxic Synovitis of the hip is a harmless condition. It can imitate a septic arthritis of the hip. The symptoms are a limp, moderate pain and usually no fever. Toxic synovitis tends to occur in toddlers after jumping too much.

Pain Scale

  • Mild: your child feels pain and tells you about it. But, the pain does not keep your child from any normal activities. School, play and sleep are not changed.
  • Moderate: the pain keeps your child from doing some normal activities. It may wake him or her up from sleep.
  • Severe: the pain is very bad. It keeps your child from doing all normal activities.

Barton Schmitt MD, FAAP
Disclaimer: this health information is for educational purposes only. You, the reader, assume full responsibility for how you choose to use it.
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