It could be a secondary problem related to the first problem or that the infection is not completely cleared up yet. I would not call it normal. The herpes sores could have become secondarily infected with bacteria. You could have another sexually transmitted disease- often when you get one you are at high risk for getting another or they could have been transmitted at the same time. In any case, it would be best to have this evaluated as a different treatment may be needed. Hope this helps.