Can you get canker sores from not brushing?

While not brushing your teeth regularly can contribute to poor oral hygiene and increase the risk of gum disease and other issues, canker sores are not directly caused by a lack of brushing. Their exact cause is often unknown but may be linked to factors such as stress, certain foods, hormonal changes, or a deficiency in vitamins. Maintaining good oral hygiene can help reduce the risk of developing sores and promote overall oral health.