What Causes Tiredness, Drowsiness And Pain In Legs And Lower Waist?

hi! Doctor, i am 37 year old man my hight is 5.4'' and my weight is 62 kg , since many days my i feel very tired, always youking, whole day and night i legs are getting very tired, it pains in my legs till my back lower waist, some time i feel no strength in my legs kindly make me healthy and active with good health