Boyfriend was walking in the park on Tuesdau and realised in the evening he'd been bitten on his calf. He didn't know what bit him and they just looked like normal bites so we didn't pay much attention but now they look like this. The biggest is about the size of a penny. They are a bit raised and not itchy. I want him to call 111 for some advice because they don't look right to me but he won't.