Hi, Welcome to Healthcaremagic. I had gone through your question I can understand your concern. The condition can be because of the wrong posture or tight cloths or sitting on hard surface too long. Because of the nerve compression you had lost the control over the leg. You don t need to worry about it. In case the loss of sensation or the motor control is not regained for more then an hour you must visit an emergency room for further evaluation. You must also avoid sitting too long in single posture, avoid tight underwears, also take vitamin B12 supplements. Hope my answer will helpful to you and write down to us further if you feel any need. Regards Dr Muzaffer Hussain Parray.