Suggest Treatment For Different Complexion Of Limbs

my question is to skin doctor.sir/mam, i m in a great problem. my right hand & leg is lees bright than my left even in armsthough i take care of both,but how it is possible? pls give me a solution,my skin type is normal bright.i noticed it about 3weeks ago,what should i do? pls pls pls pls pls pls pls pls give me the solution.my age is 22,height is 5 feet,