Lack of sleep can contribute to the development of canker sores due to several factors:

Weakened Immune System

Sleep is essential for maintaining a strong immune response. When you don’t get enough rest, your body’s ability to fight off infections and heal tissue decreases, which may make it harder for your mouth to recover from minor injuries or irritations that can lead to canker sores.

Increased Stress Hormones

Sleep deprivation elevates stress hormone levels, such as cortisol. Chronic stress is a well-known trigger for canker sores, as it can disrupt the balance of your immune and inflammatory responses.

Impaired Tissue Repair

During sleep, your body performs repair and maintenance, including healing minor oral injuries. Without adequate sleep, this process slows down, making you more vulnerable to sores.