I’ve got the best advice for you and trust me i’ve spent a day reading about it.. Let’s go !

Step 1: Cool off your skin (using water/baking soda/Vinegar)
If the area is small and the pain is acceptable then use a wet compress with baking soda. Yes you got to find some around you -there should be baking soda in any kitchen. No baking soda ? Use Vinegar.

If area is larger and pain is greater go for a bath. Same thing :
add a half cup of baking soda or several cups of colloidal oatmeal (available at drugstores). Soak for 10 minutes. Repeat as often as needed.

Step 2: A treatment for soothing (regardless of whatever cream you use here apply and leave for 45min, then apply again)
If you can go to your drugstore and get Aloe Vera gel. It is the best sunburn remedies hands down. It soothes, cleans and speeds up the healing process while also providing incredible skin moisture.

If you’re a health freak and have Aloe Vera leaves at home, break the leaves/extract the juice/apply.

Alternatively you can also go to the pharmacy/drugstore and
ask your pharmacist a cream to repair sunburnt skin. He may give you a 1% hydrocortisone cream. Apply to the sunburned areas – it works very well. [Don't use this on a child younger than two years of age]

[There are other esotheric treatment for soothing such as Cold yogurt applied to the skin. Or fizzy mineral water helps relieve the pain. Also the insides of cool cucumber skins rubbed on the skin feels good too. Finally for severe burns, make a paste of slippery elm bark and water also helps]

Step 3: Take an aspirin
If you’re an adult, take an aspirin; its anti-inflammatory properties will help relieve the pain. If treatment is for a child under 16 aspirine is not appropriate; give them acetaminophen or ibuprofen instead.

Step 4: Let your skin heal
Let your skin heal. If blisters form, leave them alone; if they break and it’s hitchy, go to a pharmacy and ask for an antibiotic ointment. Unfortunately, there’s not much you can do about peeling—but a moisturizing lotion can ease any itching.

Step 5: Buy a good sunscreen
Buy a good sunscreen and a big sunhat so you don’t get burned again. And stay out of the sun until your burn has healed!

That is all you need to know. Period !