Does ONLY ringworm in humans glow under a blacklight or is there other rashes that will glow too?

Ok so here is why i’m asking. A month ago I got a kitten from a shelter. A week after I brought him home I noticed two small red bumps between his eye and ear, two on the back of his neck and one on each paw. The bumps turned into white scabs that clustered the fur together, if I cleaned them the fur came off. I took him to a vet and they shown a black light on them and said that they didn’t think it was ringworm because ringworm in cats will glow a neon green and these weren’t that color. So I didn’t think much of it. All of the scabs went away except for the two on the back of his neck. None of them grew in size at all and the ones on the back of his neck changed to normal looking scabs.

So here is where my question comes in. Tonight before bed my boyfriend asked me to look at a itchy spot on his shoulder that looked similar to this. It is small enough that it could fit on my thumb nail. Now I know that the picture says its ringworm, but that’s just the closest I could find to what it looks like. We live in a household of 3 people and our kitten is a indoor cat. No one else has any symptoms. I play with my cat all the time and constantly have deep scratches from him that have never caused anything to happen to me. My plan of action for tomorrow is to get a black light to shine on my boyfriend to see if it glows like the vet said it will before we pay to see a doctor for something we could just get over the counter medicine for. But before he freaks thinking its ringworm (if it glows) are there any other rash like spots that can glow under a blacklight as also?