You are of black colour, it is result of corresponding genes,
But you have pimple that is the problem
You have to follow below instructions to treat it
1. Avoid oily or fast food 2. Eat simple food and take proper diet of protein
3. Avoid cream or feshwash without prescription
4. Treat your consultation, I think you have constipation
5. Drink plenty of water about 7-8 lt.