I am a college student and I was working in a lab where I accidentally had some Sodium Hydroxide splash up into my face. It did NOT get in my eyes but it did hit my cheek. Following the incident, I washed my face several times with cool water and soap (maybe 20 minutes total washing time). It is now 10 hours later and I still have a minor chemical burns about the size of a half dollar on my cheek and a streak where the liquid ran down my face. Is there anything more I can do at this point to make the burn go away? Is the burn mark permanent? Any insight would be great .I’m a little worried.