Do some bug bites disappear then reappear after a month?

I got what I thought was a spider bite on the heel of my palm that appeared one morning when I woke up. Unconcerned I put a small band aid over it and ignored the small bit of pain pressing on the area caused. It seemed to disappear within a few days but a month later I got a very similar mark in the exact same spot with the same level of pain when pressed against. Now a few weeks later from that its back again. Can this still be a bug bite or does anyone know another possibility?