My chest have some extra musceles it's look like brest a little and there is hard thing inside my chest , i have this for the past three months?

Must be seen: Any abnormal swelling or mass must be evaluated and treated. Even though you are a young male but still you may have a tumor , benign or malignant in your breast. After being examined and listened, you will need a sonogram and decide if you need excision or biopsy depending what they find. Men also can get breast cancer. It's rare but possible.