Can a sunburn affect my grafts? (Photos)

Minor sunburn in the recipient area due to high temperature inside the car (no direct exposure to sunlight), 1 month po. I didn't expose my head to direct sunlight but still i have a sunburn in my recipient area. I got it because of the high temperature inside my car as air conditioning wasn't working (for 10-15 mins). I am 1 month post op and my doctor said that sunburn can't affect grafts as they are deep inside the skin. I have redness, not sure about the bumps, I am really worried. Please do check the photos