hello.
first off - you shouldn't have used dbol alone. i mean, i know some people do, but its better test alone. with more experience, test + dbol. but no dbol alone.
anyway, that is the result of high estrogen. you can block estrogen from reaching breasts causing the gyno with nolvadex and keep high estrogen levels if you do not experience any other high estrogen symptoms, because estrogen can help build muscle. or you could lower estrogen with arimidex in case you get other high estrogen symptoms. with both you should be careful not overdoing them as they can cause side effects.
some people use both, in order to both block and lower estrogen
what you can do - 40 mg/day nolva for 1-2 weeks, or arimidex around 1 mg every other day or so for 1-2 weeks. adjust the dosages accordingly