Crusty sore on my lip won’t go away. Appointment is impossible to get right now. What is this?

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.

4. Allergic Reactions and Irritants

Lip sores may also be the result of allergic reactions or irritation from certain substances. Common culprits include cosmetics, dental products, and foods. For instance, some people may develop contact dermatitis, which causes redness and swelling, after using a new lip balm or toothpaste.

Identifying and eliminating the irritant is crucial in these cases. Switching to hypoallergenic products and avoiding known allergens can help alleviate symptoms and promote healing.

5. Bacterial Infections That Affect the Lips

Bacterial infections, such as impetigo, can cause sores on the lips. Impetigo is characterized by red sores that burst, ooze, and develop a yellow-brown crust. It is highly contagious and often requires antibiotic treatment.

Maintaining good hygiene and avoiding contact with infected individuals can help prevent the spread of bacterial infections. If a bacterial infection is suspected, it’s important to seek medical advice for appropriate treatment.

6. Identifying Squamous Cell Carcinoma

While rare, persistent lip sores can be a sign of squamous cell carcinoma, a type of skin cancer. This condition often presents as a scaly patch or nodule on the lip that does not heal. Risk factors include prolonged sun exposure, smoking, and a history of precancerous conditions.

Early detection is crucial for successful treatment. If a sore does not improve or shows signs of growth, a biopsy may be necessary to rule out cancer.

7. When to Consider Autoimmune Disorders

Autoimmune disorders, such as lupus or pemphigus vulgaris, can cause persistent sores on the lips and other mucous membranes. These conditions occur when the immune system mistakenly attacks healthy tissues, leading to chronic inflammation and sores.