When i walk, after 5-10 minutes, i get severe pain in my lower legs. this occurs in arms and hands too when playing drums and piano respectively.

Circulation or nerve: It could be numerous things. Poor circulation or nerve problem. You should get a set of labs done such as CBC and lipid panel to check if you have high cholesterol. . Additionally, you should go to a cardiologist and get an ekg, abi, and arterial ultrasound of the arms and legs. Also, if those are negative, get a nerve conduction test to see if you may have carpal tunnel or any nerve problem.