This is because being very overweight can intensify infections such as gum disease.
Obesity is also related to other oral health conditions, like dry mouth and cavities. It can have a huge impact on general health too.
Younger people are at particular risk of becoming obese, but it can affect people of all ages. So, no matter how old you are, it is extremely important to maintain a healthy lifestyle with a good diet and regular exercise.
Speak to your dentist if you have any concerns about these issues.