Syrian Head Wound and Hair Loss

[Milton]

Hi found a small cut on my hamster’s head the other week. Read some articles online and decided to let it heal on its own and observe the wound. It got better a few days ago but yesterday found another wound near the same area and even more hair loss. He did not fall or have any other hamsters in the cage with him. Havent observed him rubbing against his cage at all either. Cant find anything online similar to this and wanted to know what it may be. Should I be worried?