I first noticed this rash on my lower leg whilst taking a bath a few hours ago. I shaved the day before but I've never had a reaction like this and it's only on that part of my leg. Two inches away from it is a small shaving cut which I don't think is infected. It's not hot to touch but has slight pain if I press on it. It still blanches slightly. I'm not sure what this is and any advice or ideas are greatly appreciated, thank you.