I have no symptoms at all, they virtually appeared
overnight. They look exactly like a scratch, but it is not a scratch. A couple of weeks ago, the exact same thing appeared on my chest and then disappeared a few days later. Do you have any ideas what it could be? I looked it up online, but it only freaked me more.
I am a male, 29 years old. Three months ago I was diagnosed with acute sinusitis, which now became chronic..