Watermelon is my favourite fruit ! I have very heaty body and get mouth ulcers easily if I don't drink enough water. Whenever I get mouth ulcers, I will blend a jar of Watermelon mixed with lemon juice for myself. Surprisingly the next day the pain disappear and ulcer gone. Besides, whenever I got drunk from Pub, my wife will feed me a glass of watermelon juice so I can walk myself steadily back to bed without vomiting. Yes! that's the healing power of Watermelon. Cheers!