Fruity breathe (like nail polish remover) smell, can be a serious sign that you have diabetes and your blood sugar level is very high. If it isn’t control properly, coma or death will follow you. If you breathe smells (like urine or ammonia) then it may be the sign of kidney failure, diabetes or hypertension. If you breath smells (like fishy) then it may be the sign of kidney failure. Treatment: Visit doctor + blood tests to confirm.