Fake wound Ideas

My group have been given the part of the scene where the actor has a scabby wound on their arm. I have been doing a bit of research on line and there are several good how t guides on you tibe. I started to wonder What kind of look we would want.

I think that It would be nice to have something that look like an 'entry point' for what is crawling under the skin. Soemthing a little like this:

This is created with liquid lates and I think That it looks both like a scab that the character could pick but also like where a small organism could get in or out. Like the horror stories we hear of people who are bitted by exotic and end up playing host to their young. Also I think it would be nice to surround it with irritated skin, looking like there has been a lot of scratching. Something like this,

It almost looks like the flesh has been burned. This will give an idea of the harm the thing moving under his skin is doing. Als the idea that something within his is sreading from this. I think this adds to the idea of the Uncanny, it reminds me of something from one of Paul Jennings Uncanny short stories.