Hi My kid is 5 year old and 5 days back he complained of cold and cough. We visited doctor and he advised few of antibiotic ibugesic and montair medicine. After 3 days his cold and cough was gone but next morning he woke up with extreme pain during walk and standing position. We rubbed his legs and after few hours he started walking at least with less pain behind the knees. Now this is second morning he still feels and complains about great pain in standing and walking. Kindly suggest?