Its not a big problem dont worry about this,
first of all clean that scar with hot water and take coconut oil and mixed with turmeric powder and make a paste like and apply by keeping this on spare time it will giv a super solution take care bye..
Always apply wet mehndi on the affected area in case of burns to avoid blisters and early healing of the wounds. This will not only relieve the pain but will also reduce the chances of scars. I have tried this time and again and this has always proved a best remedy for burns. This is the only best medicine for burns that I have discovered.