<s>[INST] I have had severe stabbing pains every 20-30 seconds in my calf for the past 4 hours... no injury or nothing new pain is intense and lasts 3-7 seconds then off and back again in 20-30 seconds no matter what I am doing or what position I try with my leg... Please advise [/INST] Half pain can arise due to many causes such as muscle strain, sciatica,vitamin and mineral deficiency. Rest, ice compression, elevation of the limb and over the counter painkillers can be used. Vitamin D and Calcium deficiency can also cause calf pain. Serum electrolytes and Blood sugar levels should be measured. More serious causes of muscle cramps such as kidney failurehypothyroidismalcoholismdiabetessevere peripheral vascular disease should also be ruled out. Hope that was helpful. Let me know if I can assist you further. Regards Chat Doctor.  </s>