While prevention is the best method here, there are ways to treat some cases of sun poisoning at home. 

“Mild cases can be treated at home with a cool compress, staying hydrated, and pain medication,” Glodney says. 

However, “In cases where sunburn has resulted in blisters, dermatologists may provide guidance on proper blister care,” Portela adds. “This typically involves keeping the blisters clean, avoiding popping or picking at them, and applying antibiotic ointments to prevent infection.”

As with any sunburn, make sure to avoid irritating products on the damaged skin (fragrance, exfoliants, and the like) and look for soothing ingredients, like aloe vera, colloidal oatmeal, ceramides, vitamin E, shea butter, postbiotics, etc.—more general sunburn remedies here, if you’re curious. 

Sun poisoning should generally heal within a week, but the exact duration will depend on severity and treatment. As a general rule: The more diligent you are with topical and internal care, the quicker it will heal.