Thanks for your query.
Garlic is a strong irritant for the skin. WHy did you apply it? Did you have a wart
or mole?Anyways, avoid doing it in the future.
As for the present condition, if there is no change in the texture of the skin or if there is no scarring, then the colour would normalize eventually.
just apply a moisturizing cream 2-3 times daily. the time taken to heal such an injury
is usually 3-6 months.