There are several potential causes for a sore on the lip that won’t heal. Common factors include viral infections, bacterial infections, allergies, and chronic irritation. Each of these causes affects the lips differently and requires a unique approach to treatment.
While some causes, like minor cuts or chapping, are relatively benign and resolve with basic care, others may require medical intervention. Understanding these causes can help guide appropriate self-care measures and inform discussions with healthcare providers.
3. Cold Sores: The Viral Culprit
Cold sores, also known as fever blisters, are caused by the herpes simplex virus (HSV). They often appear as clusters of small, painful blisters that can rupture and form a crust. Cold sores are highly contagious and can be triggered by stress, illness, or sun exposure.
Typically, cold sores heal within two to four weeks. However, in some cases, they may become persistent due to frequent outbreaks or secondary infections. Antiviral medications can help manage symptoms and reduce the frequency of outbreaks, but they do not cure the virus itself.
