Sunburn: When to Worry and When to See a Doctor
Last updated September 10, 2026.
Most sunburns heal at home with cool compresses, moisturizer, and time. You need medical care if you develop fever, chills, confusion, severe blistering across large areas, or signs of infection. Here is how to tell the difference between a bad sunburn and one that needs a doctor.
What makes a sunburn severe
Sunburn severity ranges from pink skin that feels warm to deep burns with fluid-filled blisters. First-degree burns affect only the top layer of skin and turn red. Second-degree burns go deeper and form blisters. Most sunburns you get from a day at the beach are first-degree.
Severe sunburn, sometimes called sun poisoning, means widespread blistering, intense pain, or whole-body symptoms like fever and headache. The term sun poisoning is not a medical diagnosis but a label for serious sunburn that triggers a systemic reaction.
Burns covering more than 20 percent of your body, blisters larger than a quarter, or burns on your face and hands are red flags. Children and older adults are at higher risk for complications.
Signs you need to see a doctor
Go to urgent care or call your doctor if you have fever over 101 degrees Fahrenheit, severe chills, dizziness, or confusion. These symptoms mean your body is struggling to cope with the burn. Dehydration and heat exhaustion can follow severe sunburn.
See a doctor if blisters cover a large area, are extremely painful, or show signs of infection like pus, red streaks, or worsening swelling. Do not pop blisters yourself. Breaking them increases infection risk.
Seek care if the burn is not improving after a few days, if pain becomes unbearable, or if you develop nausea and vomiting. These can be signs of severe dehydration or a more serious reaction.
Emergency warning signs
Call 911 or go to the emergency room if you faint, have a rapid pulse, feel extremely weak, or become confused or disoriented. These are signs of heat stroke or severe dehydration, both medical emergencies.
Burns covering large portions of your body, especially if combined with fever or chills, need emergency evaluation. The ER can provide IV fluids, pain control, and wound care for extensive burns.
If you have trouble breathing, severe swelling of the face or lips, or signs of shock like cold and clammy skin, get emergency help immediately. These symptoms are rare but life-threatening.
How to care for blisters at home
Leave blisters intact. The fluid inside cushions the healing skin underneath and protects against infection. Cover large blisters loosely with a clean, non-stick bandage if clothing rubs them.
If a blister breaks on its own, wash the area gently with soap and water, apply antibiotic ointment, and cover it with a bandage. Change the bandage daily and watch for infection signs like increased pain, redness, or pus.
Do not peel away dead skin. Let it come off naturally as the new skin forms. Pulling it off can cause scarring and infection.
Hydration and pain relief at home
Drink extra water for the next few days. Sunburn pulls fluid to the skin surface and away from the rest of your body. You can become dehydrated even if you are not thirsty. Aim for clear or light yellow urine as a sign you are drinking enough.
Take ibuprofen or acetaminophen to reduce pain and inflammation. Follow the package dosing instructions. Start these medications as soon as you notice the burn to get ahead of the pain.
Cool baths or compresses help. Add colloidal oatmeal to bathwater if your skin itches. Avoid ice directly on the skin, which can cause more damage. Apply aloe vera gel or a fragrance-free moisturizer several times a day.
Where to go for non-emergency care
Urgent care centers handle most sunburns that need medical attention. Typical costs run $150 to $250 without insurance. They can assess the burn, prescribe stronger pain medication or steroid creams, and check for infection.
Your primary care doctor can see you if the burn is not improving or if you have questions about healing. Community health centers offer care on a sliding fee scale if cost is a barrier. Find one at findahealthcenter.hrsa.gov.
If you are unsure whether your sunburn needs in-person care, you can start with a free AI doctor consult by text through Pymander Health to talk through symptoms and next steps. This does not replace a doctor but can help you decide whether to seek care now.
Common questions
When should I go to the ER for a sunburn?
Go to the emergency room if you faint, feel extremely weak or confused, have trouble breathing, or show signs of shock like cold, clammy skin. These are signs of heat stroke or severe dehydration. Burns covering large portions of your body combined with fever or chills also need emergency evaluation.
How do I know if my sunburn is infected?
Watch for increasing pain, spreading redness, warmth, swelling, pus, or red streaks extending from the burn. Fever and chills can also signal infection. If you notice any of these signs, see a doctor. Infected burns need antibiotics.
Should I pop my sunburn blisters?
No. Leave blisters intact to protect the healing skin underneath and reduce infection risk. If a blister breaks on its own, wash it gently with soap and water, apply antibiotic ointment, and cover it with a clean bandage. See a doctor if the blister is very large or shows signs of infection.
What is sun poisoning?
Sun poisoning is not a medical term but refers to a severe sunburn that causes whole-body symptoms like fever, chills, headache, nausea, or dizziness. It means the burn has triggered a systemic reaction. If you have these symptoms, see a doctor or go to urgent care.
How long does a severe sunburn take to heal?
Most first-degree sunburns heal in three to five days. Second-degree burns with blisters take one to three weeks. Pain usually improves within a few days. If your burn is not improving after a week or symptoms worsen, see a doctor.
Can I treat a bad sunburn at home?
Yes, if you have no fever, confusion, widespread blisters, or signs of infection. Take ibuprofen for pain, drink extra water, apply cool compresses and aloe vera, and leave blisters alone. See a doctor if symptoms worsen or do not improve in a few days.
Sources
Pymander is not a replacement for a physician and does not provide medical advice, diagnosis, or treatment.