My skin has dark spots everytime a mosquito bit recovers even though i did not scratch may i know what remedies are there to make it disappear?

Hyperpigmentation: The dark marks are likely Post Inflammatory Hyperpigmentation. This will likely improve over time (all scarring will lighten with time). There are treatments that can improve the appearance, including creams like hydroquinone, steroid creams and laser treatments like laser genesis. See a dermatologist or cosmetic physician to learn more about treatment options.