Vinegar-The acetic acid found in vinegar is said to reduce pain, itching, and inflammation. Add a cup of cider vinegar into your bath water and soak your burned skin into it. It can also work like a natural aspirin. Simply dab a bit of white vinegar on to your sunburn for 20 minutes of instant pain relief. Coriander oil-For a soothing effect, use it as an essential oil by lightly rubbing it onto your sunburn. Green tea-Green tea's catechin and tannic acid help soothe sunburn pain.