What are these bumps?

They could be nothing. Or they could be cause for concern. The body develops all sorts of growths on the skin; some of them are benign, some need attention. Rather than depending on a bunch of people you don't know trying to advise you on the basis on a blurry photograph, you really ought to consult a dermatologist. They look at these growths all the time and are much better at appraising them than people on a message board like this. The chances are that the bumps are completely harmless but again, I really suggest you consult a professional.

Thanks for the response. i was not sure what kind of specialist should I see, that is why I asked. Will start with a dermatologist then.

Sure — I recently was referred to a dermatologist because I had a few spots which concerned me. It turned out that they were perfectly okay — but then he noticed another spot which I hadn't paid any attention to, diagnosed it, and prescribed a topical cream because it had the potential to become cancerous. Two months later it was all cleared up.