i'm sorry to hear you are having a tough time. since it is tough to eat maybe drinking your nutrition would be better. you can try smoothies mixed with fruits veggies protein powder juice/milk and dairy ( some listed here ). you can also buy drinks like ensure which are fortified with vitamins and minerals. you can also try puree soups. drink with a straw to minimize liquids touching the areas of your mouth that are painful. if your symptoms persist consider visiting a registered dietitian. i hope you feel better soon!
i have shingles in my mouth very painful can't eat. suggestions of what foods/diet might help to get proper nutrition