Sure, you can. Grapefruit: It is recorded in Compendium of Materia Medica that "eat it, get rid of bad breath in the stomach, relieve alcohol toxicity, treat the spirit of the drinker, do not think lightly about eating, resolve phlegm and relieve cough". Tea made of grapefruit has this habit in ancient China, Japan, South Korea and other countries. In modern people's mind, citron tea also has the beauty effect, because, ah, grapefruit is rich in VC, three times more than lemon! So patients with stomach trouble can drink honey grapefruit tea.