1.Peripheral Neuropathy
This happens when there’s damage to the nerves in your body that relay messages to and from your brain. The most common cause is diabetes, but other health conditions, medicines, injuries, or infections can cause it. If it affects the nerves in your legs, they might feel prickly or tingly, or they might be numb or weak. Your doctor will treat the condition that’s causing it and give you medicine for pain if you need it.
2.Electrolyte Imbalance
Electrolytes are minerals like sodium, potassium, and calcium that help your muscles work the way they should. You lose some through sweat when you exercise, and if you lose too much, your legs can cramp or feel weak or numb. It can happen when you get some medical treatments, like chemotherapy, too. Sports drinks with electrolytes — or water along with foods that have those minerals — can help. See your doctor if you cramp up often.