Unfortunately, it's difficult to determine the best solution for you without the benefit of photographs or a formal evaluation. Generally speaking, scars can be improved with a combination of surgery and/or lasers and microneedling with PRP. Below is a more detailed reference list of the...
Please go see a board-certified dermatologist to help you devise a plan for treating your scar.
As a general rule, hydroquinone is used to treat hyperpigmentation (darkening of the skin) and not scars per se. As noted by another doctor, prolonged use of hydroquinone can actually...
It is impossible to fully answer your question without being able to see the scar. I recommend an in-person evaluation with a board-certified dermatologist to fully assess the area of concern.
As a general principle, there are many possible treatments for scars, including...