Hello, Silverex is an antibacterial and is suitable for burnt wounds. It is good to use it as prescribed by the doctor. Meanwhile, try not to open the blisters as they may become more painful and may get infected if they are opened. You need to give him something for pain, Crocin has paracetamol, which may help but add Ibuprofen might help even better as it helps with inflammation as well. If the redness spreads then he needs to be seen by a doctor and check if it is getting infected and if oral antibiotics are needed. Most of the time these heal well with only minimal scar tissue. I hope this answers your query. Let me know if I can assist you further. Regards, Dr. Antoneta Zotaj, General & Family Physician