Ngâm mình trong nước mát hoặc tắm rửa nhẹ nhàng. Chườm lạnh. Sử dụng thuốc giảm đau không cần kê toa. Thử dùng thuốc giảm đau tại chỗ. Mặc quần áo bằng vải cotton thông thoáng. Hãy xem xét sử dụng kem bôi có chứa cortisone.

I'm interested in that, but I only have a few mins. Can you give me at most the first 500 characters of a detailed explanation in English about that?
Keep the water just below lukewarm (cool, but not tooth-chattering cold) and relax for 10 to 20 minutes. If showering, use a gentle stream of water, not a full blast, to avoid irritating your skin. Air dry or pat gently with a towel to avoid abrading the skin.  Avoid using soap, bath oils, or other detergents as you bathe or shower. Any such products can irritate your skin and possibly make the effects of the sunburn feel even worse. If you have blisters forming on your skin, take a bath instead