What Causes Leg Pain?

Hi, may I answer your health queries right now ? Please type your query here...hai doctor my age is 58 female and i had a severe leg pain and it disturbing my sleep also.after walkinf if i sit some time it pains very much and i cant move a little bit that time .i cannnot sleep with this paining siverly.can u suggest wht is my problem and which doctor should i consult thank u.