There are several causes for burning and
itchiness when urinating. The first is a urinary
tract infection (which you have been treated for).
Another cause would be pyelonephritis (an uncommon presentation), or urethritis (either chlamydial or gonococcal urethritis). Trichomonas vaginalis, Candida albicans, and Herpes simplex virus can also cause urethritis.
If you are female, vaginitis would be a consideration, if you are a male, prostatitis would also be considered.