Electrolytes are important for the function of many different parts of your body. Having the wrong levels of some electrolytes can cause the muscles in your feet to not work properly, causing foot cramps. Your doctor can order blood tests that will determine if your foot cramping is due to electrolyte imbalances.
Foot Cramps
Muscle cramps are involuntary muscle contractions that occur suddenly. Muscle cramps can cause intense pain and, although harmless, can make it difficult for you to move or use the affected foot. There are a variety of things that can cause foot cramps, including stress, poor circulation, nerve problems and dehydration. Cramping can also be due to underlying diseases, such as diabetes, thyroid problems and anemia.
Electrolytes and Muscle Function
Electrolytes are substances, such as sodium and potassium, that have an electrical charge when they are dissolved in your body. Muscle contractions are stimulated by miniature electrical currents within your muscle tissue. This electrical current is generated by changes in the levels of electrolytes inside and outside of muscle cells. Consequently, electrolyte imbalances can disrupt muscle function, leading to cramps.
Hypokalemia
Potassium is particularly important for muscle function. If your blood levels of potassium get too low, you have a condition known as hypokalemia. Hypokalemia can be due to eating disorders, antibiotics, diuretics, diarrhea, kidney problems and excessive sweating or vomiting. Hypokalemia can cause muscle spasms or cramps, fatigue, abnormal heart rhythms and constipation. Blood tests that measure the levels of electrolytes in your blood can be used to diagnose hypokalemia.
Treating Foot Cramps
If you are having foot cramps, changing the position of your foot and massage it gently to try and relieve the pain. If you get foot cramps after sweating or engaging in physically strenuous activity, consume a beverage with electrolytes, such as a sports drink. Aspirin, elevating the affected foot, moist heat and warm foot soaks may also provide some relief.
