what is the medical word for lesions that are caused from chronic irritation in the mouth?

The usual medical term for lesions in the mouth caused by chronic irritation is “traumatic lesions” or more specifically “traumatic ulcer” (for a sore) and “traumatic fibroma” (for a chronic, raised bump from long‑term rubbing).

Quick Scoop

When the mouth lining is repeatedly rubbed, bitten, or scraped (for example by a sharp tooth edge, ill‑fitting denture, or habitual cheek biting), clinicians typically describe the resulting spots as:

• Traumatic ulcer – a sore/ulcer that forms where there’s ongoing physical irritation.
• Traumatic fibroma (also called irritation fibroma) – a firm, smooth bump that develops over time from chronic rubbing or biting.
• More generally, they may be grouped under “physical and chemical lesions of the oral mucosa” or simply “traumatic oral mucosal lesions.”

These are descriptive, not disease‑name “brands” like canker sores or lichen planus. A dentist or oral medicine specialist will usually document both the lesion type (ulcer, fibroma, white patch, etc.) and the cause (chronic mechanical irritation).