Hello chewang,
Try not to be overly concerned. bumps on the male member are very common and the vast majority are not a cause for concern and are easily treated.
However, some can be and some are also contagious. As you have not been in a sexual relationship recently, if they are contagious then it has not been passed on.
My advice must be to get it checked out by your doctor and get the cause diagnosed. He/she will be able to prescribe the proper treatment.
For more information on penile lumps please visit:
http://www.netdoctor.co.uk/menshealt...onthepenis.htm
Although the chances are that there is nothing to worry about, I think you will agree it is better safe than sorry.
Good health.
Cy
(Poseidon)