I have some raw parts on my inner bottom lip, i was looking at it in the mirror and it kind of looks like a rash. what is this?

Virus or dental: Many viruses can cause rashes on the lips; if that's the case this should resolve in 1-2 weeks. If not, its likely a dental malalignment issue that your dentist could evaluate. Other possibilities include a food allergy, use of tobacco products, gum disease with swelling causing erosion,

Inner bottom lip: This cannot be diagnosed without a visual and clinical examination, and additional information such as exact location, bleeding or not, pain, swelling, last dental visit, etc. Make an appointment to see a dentist.