Hi, Thanks for your query. After going through your suffering, it seems you have developed muscle spasm (cramp).The cramps are caused by hyper excitability of the nerves that stimulate the muscles. Drugs given for asthma, anginaand Parkinsonism also lead to cramp. A simple way to prevent cramp is- 1. Warm up and stretch your calf muscles before running stretch your calf muscle before going to field 3-4 times and each time holding for 10-15 seconds. 2. Talk to qualified trainer for proper running form and footwear. 3. You may run in a heel-toe pattern and avoid letting the balls of your feet hit the ground first. 4. Stay properly hydrated before, during and after you run and eat a balanced diet with adequate minerals, particularly potassium and magnesium. Taking a multivitamin can also help I do hope that you have found something helpful and I will be glad to answer any further query. Take care