In my experience -

1. People are not as quick to judge you with burns as they are with cuts. Its not obviously self harm, burns happen accidentally all the time (but vertical cuts on your arms and legs do not).

2. Antiseptic cream if the blisters are open, this dries it out but it is needed to keep away infection. I never got infections from burns when using savlon on them. Keep them uncovered unless they are weeping so much that you cant. Aloe vera is great for burns too, I have used both.

3. It can be very very awkward at work. Best not to get into that situation. It really depends on your boss as to what happens. Just not worth risking your job over, there are other coping strategies you can try before turning to self harm, it is NOT the only answer and certainly not the best solution.

Everytime you choose the SI you are choosing the consequences, which can be a whole lot more than a little scarring.