For stretch marks and dark patches or spots ki Solution enti antaru ??

M21 nenu, like oka 4-5 years nundi dark patches unde groin area la, stretch marks kuda koncham ekkuvane and back of my bum blackness and spots. Vetiki solution emantaru ? Food ? Medicines? And also how do u guys trim the hair in the area , groin , back of the bum and legs