I'm 21 years old, and one of my nipples is inverted and other is very slightly pointed outwards. Is it a matter of concern?

Surgery is the best way.  You can try a minimally invasive approach using a needle with a small cutting surface and possibly some filler material.

Sore mom your question was a while ago and i hope you've had it treated. You should be seen by your gyn and breast surgeon. Probably to start with ultrasound and mammogram with regard to inverted nipples Plastic Surgery, The Naked Truth about Nipple Correction To begin with, many women...

If only the ducts were cut, you may require the division of the remainder of the structures that are tethering your nipples to cause the inversion.  This usually involves dividing all the structures under the nipple and placing a internal suture to ensure the nipple stays everted.  In...

Inverted nipple correction may prevent breast feeding. Sometimes women with inverted nipples have a hard time breast feeding anyways. Also, they sometimes come out with breast feeding. Consider waiting. 

Thank you for your question. I agree with my colleagues that age is not the limiting factor. As long as your conditions allow you to have a surgical procedure safely, then there are no contraindications.Under the surgical point of you it is possible to reduce the aureolas, the skin excess both...