Eating When You Have Mouth or Throat Sores

Chemotherapy, radiation therapy, and some targeted therapies can cause mouth or throat sores — what foods should you eat (and avoid)?

Updated on April 6, 2026

Some treatments for breast cancer, including chemotherapy, can lead to painful mouth or throat sores, also called mucositis. When you’re dealing with sores, there are two important things to keep in mind about eating and drinking: first, always stay hydrated. Dehydration — and a dry mouth — can make mouth sores worse. Second, no matter what you choose to eat and drink, avoid high temperatures. Hot food can make mouth and throat sores more painful. 

Foods to eat

Foods that are cool, smooth, and/or don’t require much chewing can make eating with mouth sores less painful. 

Blended, pureed, and other soft foods

Eating these soft foods with a spoon or straw eliminates the need to chew — and can even help you keep food away from your mouth sores altogether. Options include:

  • smoothies made with fresh or frozen fruit — add a handful of greens, a protein source, and a healthy fat to make it a balanced meal

  • applesauce

  • cream of wheat

  • mashed potatoes

  • hummus

  • grits

  • pudding

  • scrambled eggs

  • refried beans

  • tofu

Soft dairy products

Soft dairy foods don’t require chewing and can even soothe mouth sores. Options include:

  • yogurt

  • kefir

  • cottage cheese  

Creamy soups

Creamy soups that don’t require chewing are gentler and less likely to irritate sores in the mouth and throat. Non-tomato-based gazpacho is an excellent choice since it’s served cold, but you can also try soups at room temperature, including:

  • cream of mushroom soup

  • butternut squash soup

  • roasted red pepper soup

  • roasted cauliflower soup

  • pea soup

Ground, minced, or finely chopped meats

Some meats can be prepared so they’re soft and require little chewing, like:

  • canned “chunk” tuna

  • mild white fish

  • ground beef, chicken, or turkey

Boiled or steamed vegetables

Cooking vegetables until they’re soft helps minimize chewing and irritation on sores. Try:

  • potatoes

  • carrots

  • broccoli

Soaked foods

Soaking food can make it softer and gentler on your sore mouth. Try:

  • soaking cold cereal in milk

  • coating rice in sauce

  • dipping toast in a runny egg yolk 

Cold drinks

Cold drinks keep the body hydrated, help food move down the throat more quickly, and even soothe mouth and throat sores. Try drinking one of these beverages with every meal:

  • ice water

  • milk

  • coconut water

  • lassi (yogurt mixed with water)

Frozen treats

Frozen desserts can soothe a sore mouth and throat (and be a sweet treat). Good options include:

  • popsicles

  • ice cream and milkshakes

  • gelato

  • sorbet

  • sherbert

Foods to avoid

Foods that burn, sting, or scratch your mouth could worsen mouth and throat sores. 

Spicy foods, sauces, and seasonings

The capsaicin in many spicy foods can irritate mouth and throat sores. Avoid eating foods like:

  • spicy curry

  • hot peppers

  • hot sauce

  • sriracha 

  • chili powder

  • cayenne powder

  • crushed red pepper flakes

  • salsa

Acidic foods and drinks

Acidic foods can cause a stinging or burning sensation when you have mouth sores and may delay healing. Avoid:

  • citrus fruits

  • tomatoes

  • berries

  • pineapple

  • vinegar

  • coffee

  • alcohol

  • fruit juice

Hard and crunchy foods

Crunchy, tough foods can scrape mouth and throat sores, causing pain and delaying healing. Avoid:

  • granola

  • pretzels

  • crusty bread

  • popcorn 

  • potato chips

  • crackers

Tips from our community

Members of the Breastcancer.org community have shared their tips for dealing with mouth and throat sores in our forums:

  • If you have an ice cream maker or high-powered blender, try making a sorbet or ice cream with frozen fruit and your milk of choice.

  • For an extra nutritional boost, try high-protein ice cream — or, freeze a protein shake and eat it like ice cream.

  • Magic mouthwash for mouth sores can work wonders.

  • Try nutrition drinks or shakes for a nutrient boost.

 
 

While your doctor may prescribe medications to help heal your mouth or throat sores, they don’t work instantaneously. Trying some soft, cool, gentle foods can help soothe the pain and give your body the nutrients it needs to recover.