Bad breath is a common thing to notice in the first few months after a gastric sleeve. Many patients experience it to some degree during this time. The reassuring part is that it is temporary and usually improves as your body adjusts.
What causes it?
The main reason is ketosis. As your body burns fat for energy during rapid weight loss, it produces a substance called acetone, which is breathed out and can give a fruity or slightly chemical smell. Drinking less than before can also leave your mouth dry, and reflux, which is common after a sleeve, can add a sour note too. As your eating settles and your weight loss steadies over the following months, the smell usually fades.
How to reduce bad breath
A few simple habits help. Drink plenty of fluids through the day in small, frequent sips, as staying well hydrated is one of the most helpful things you can do. Brush your teeth regularly, and clean your tongue too, since that is where a lot of odour-causing bacteria sit. An alcohol-free mouthwash can freshen things up without drying your mouth further, and sugar-free gum can help by getting your saliva going. If you have been prescribed a reflux medicine, take it as directed, and keep an antacid such as Gaviscon to hand if your team has recommended one. It also helps not to skip meals, as going too long without food can deepen ketosis and make the smell stronger.
Tongue coating after surgery
A white coating on the tongue can also appear after a gastric sleeve, for the same reasons. Cleaning your tongue gently when you brush, along with staying hydrated, usually helps it settle.
Gum changes after surgery
Some people notice swollen or bleeding gums a month or two after surgery. This can be linked to vitamin deficiencies, which is one reason regular blood tests are so important after bariatric surgery. Bleeding gums in the first week or so can also be down to the blood-thinning medicine often given after surgery. If your gums are sore or bleeding, mention it to your bariatric team or dentist rather than trying to manage it alone.
For most people, bad breath eases within a few months. If it lasts longer, or comes with pain, fever or being sick, speak to your bariatric team or GP.
