While going through chemotherapy, one day your mouth suddenly becomes sore. At first you take it as no more than burning the roof of your mouth on hot soup, but gradually even the tip of your tongue and the inside of your gums sting, so getting a single spoonful down becomes a task. Add diarrhea on top of that and the very act of eating becomes frightening. You know in your head that you have to eat well to endure, but when your mouth actually hurts and you keep running to the bathroom, those words sound cruel. So today, instead of grand nutrition theory, I want to lay out only the eating tips that people who have been through that period actually found comfortable.
When the mouth is sore, the first thing is to remove irritation. Spicy, salty, sour, and surprisingly hot food bother the wound the most. If kimchi stew or orange juice, things you usually liked, feel like a knife on that day, that is a signal your mouth is sending. Lukewarm or slightly cold food goes down much more smoothly. Porridge too is better cooled a bit and made thin, closer to gruel, and things that take little effort to chew — like mashed potato, well-cooked squash, tofu, or soft steamed egg — help. Drinking through a straw lets you swallow while avoiding the sore spot, so many people slowly sip nutrition drinks or gruel through a straw. Rinsing your mouth with warm water or saline before and after meals calms the pain a little, and on days that hurt too much, there is also the option of telling your doctor and getting a mouth rinse containing an anesthetic prescribed.
When diarrhea comes along, the grain is different again. Here you need to reduce things that irritate the intestines and take care to replace the lost fluids and electrolytes. Greasy and fried foods, overly sweet desserts, and dairy products like milk or cream often encourage diarrhea. Instead, it is safe to start with mild things such as plain rice porridge, well-cooked white rice, banana, peeled apple blended or cooked, and boiled potato. Rather than gulping water all at once, sip a little throughout the day, and on days when diarrhea is bad, replenishing the lost fluids with lukewarm barley tea or a diluted ion drink makes you far less worn out.
A day when the mouth hurts and diarrhea overlaps is honestly the most difficult. At such times the realistic approach is to drop ambition and go with 'small amounts, often.' Rather than being bound by the frame of three meals a day, thinking of it as a few spoonfuls divided every two to three hours greatly reduces the burden. Lukewarm egg porridge, a spoonful of mashed potato, half a banana. Finding this intersection that is low in irritation, soft, and also gentle on diarrhea is the knack. Since you cannot eat much at once, choosing the side with a little more protein and calories for the same amount means you lose less even when you eat little.
When days of eating almost nothing continue for several days, you start to get scared. At such times do not endure alone — keep track of the numbers. If you can barely get water down in a day, if your urine noticeably decreases and darkens, or if diarrhea will not stop and fever comes with it, that is not something to endure but something to report. The same goes if a mouth wound spreads white or shows blood. Such symptoms can develop into dehydration or infection, so catching them early matters.
This piece is only a story offered with an easy heart to those going through a similar period; in the end, the medical staff who see you directly know your body's condition best. If a new symptom appears or eating is really hard for several days, be sure to discuss it with your attending medical staff.