Pulsing pain, also known as throbbing pain, is almost always associated with a serious injury or condition. This is not necessarily the case when it comes to throbbing pain in the leg. A number of conditions can be causing the pain, and they range from simply not stretching enough before strenuous exercise to indications of a serious health problem (i.e., blood clots). If you are able to isolate the area the throbbing pain is coming from, you may be able relieve the pain. You should see your doctor if pain persists.
Locate the exact area the throbbing pain is coming from. Is it the thigh? Maybe the shin? Is there more than one area on your leg that is throbbing? These questions will help you tailor your pain-reducing remedy to the specific spot on your legs. It may also give you some insight on what the cause of the injury is.
Take note of what induces the throbbing pain. For example, does the pain subside by itself and only returns when you start moving or is the pain constant? If the pain only occurs when you're moving, determine if the source of the pain is your muscles. The pain will be on the surface and away from your joints (i.e., knees and ankles).
Use a bag of ice to reduce pain if you can see that source of the pain is from a surface injury like a cut or bruise. The ice will reduce the pain and any further swelling.
Do light stretching activities if you are sure the throbbing pain is coming from your muscles. Throbbing pain can be the result of simply not stretching your muscles enough before exercising. A good stretch will loosen the muscles and relieve the pain. Never continue stretching if the pain persists. Stretching should never be painful.
Take aspirin or ibuprofen if the pain is coming from deep within your leg or if the pain is so severe that you cannot move. Sprains and stress fractures have been known to cause throbbing pain and inflammation. Aspirin and ibuprofen are anti-inflammatory over-the-counter medicines and will help alleviate any pain associated with inflammation. Make sure to follow the directions on the back of the bottle, so you take the correct dose.
Immobilise your leg as best as you can and see a doctor immediately if pain persists. Fractures, clots and other serious conditions cannot be properly helped without the guidance of a doctor. The pain will most likely persist until you are able to get the professional care you need.