What is the best solution to get rid of a medium indention mark on nose...is plastic surgery the best or only option?

Not necessarily: Small irregularities on the nose (and face) can often be treated most effectively and efficiently with injection of a filler such as Restylane (dermal fillers) or juvederm. Though these are temporary, they will tend to last for 6-12 months in the nose, can be injected in the office with local anesthesia, and do not require an operating room. Surgery can always be an option, but i would try the fillers first.

Difficult to say: The best solution is to consult a plastic surgeon or ENT doc in person. Without seeing what is causing the indentation it is difficult to advise.

Nose scar: An indentation mark on your nose may be caused by various issues. It should be evaluated by a plastic or facial plastic surgeon. If due to a problem with the underlying bone or cartilage, plastic surgery may be appropriate. If due to scarring in the skin, laser resurfacing or a scar revision may be of benefit. Another option is for an experienced physician to use injectable filler materials.

Nose dent: A filler or fat graft may work unless it is due to underlying cartilage issue, then surgery may be required.

Consider: An injection of Restylane (dermal fillers) or juvederm in the area. It might improve it without surgery.