To help it feel better and heal, you should:
Cool it down: Take a cool bath or shower, or apply cool, damp cloths to the affected areas.
Moisturize: Use a gentle, fragrance-free moisturizer, aloe vera gel, or after-sun lotion. This helps keep the skin hydrated and can soothe discomfort.
Stay hydrated: Drink plenty of water. Sunburn can draw fluids to the skin's surface, leading to dehydration.
Avoid further sun exposure: Stay out of the sun, especially during peak hours (10 AM to 4 PM), while your skin is healing. Wear protective clothing if you have to go outside.
Don't pick or peel: Let your skin shed naturally. Peeling or picking can lead to infection and scarring.
Pain relief: Over-the-counter pain relievers like ibuprofen can help with pain and inflammation.
If your sunburn is very severe (large blisters, extreme pain, fever, chills, dizziness), it's a good idea to see a doctor.