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This is dr David
Sorry about your sun burn
You should drink plenty of water and use aloe on your skin and lots of moisturizing cream
If your skin starts to blister you should see a doctor and get prescription silvadine ointment or neosporin on blister areas to protect against infection risks
There are also over the counter 1% lidocaine aloe gels which can numb and decrease pain
Let me know if you have other questions