How do you treat a sunburn blisters?

Vaseline: Application of vaseline or similar petroleum jelly should help.

No specific creams: There is no need to treat sunburn blisters as it would get better on its own in due course. However, physicians may give local pain relieving creams such as pramoxine and nonsteroidal anti-inflammatory creams, all of which will require a prescription.

Aloe vera: Keep sunburn cool with moist cool/cold compresses. Avoid alcohol containing products. Break off pieces of aloe vera plant & apply sap to skin. Consider non-steroidal anti-inflammatory meds to reduce pain. Don’t yank off peeling skin or burst blisters. Seek medical care for severe pain, fever, lack of improvement of symptoms within several days or if a large surface area is blistered.