Most likely you're just noticing something that has been like that all along. It's also probably caused by the way you use your cell phone, as this is a common problem. But to get a diagnosis of something that might have happened to it other than overuse injuries or poor posture, you have to see a specialist who can do that. Try not typing on your cell phone for a couple weeks with that hand and see if the pain goes away.
Pain in radial side of wrist in distribution of median nerve, exacerbated by typing and pressing hand against wall (reverse Phalen's test), is suspicious for carpel tunnel syndrome. The tiny bumps in your wrist may be ganglion cysts, which can be confirmed with US or MRI. If you are convinced they are bony, consider radiographs to rule out osseous abnormalities.
This article outlines a clinical approach to diagnosing wrist pain:
Please refer to Table 3 for specific maneuvers.