How did the cold sores on my lips turn entirely into yellow crusts?

Herpes labialis is a common oral condition caused by the herpes virus. During the healing process, the blisters gradually resolve, rupture, and form yellowish crusts. The specific factors are analyzed as follows:

1. Picking at the Crust

If patients manually pick at the crust, it may lead to infection and pain, and also prolong the healing time, resulting in yellow crusting. Patients are advised not to touch or peel the crust with their hands to prevent infection and discomfort.

2. Severe Infection

If herpes labialis becomes severely infected, the virus may proliferate, causing the blisters to rupture and form yellow crusts. It is important to keep the lip area clean to prevent secondary infection.

3. Improper Treatment

If herpes labialis is not treated promptly and correctly, the condition may worsen, leading to blister rupture and the formation of yellow crusts. Under medical guidance, patients may use lip care products such as lip balms to maintain moisture in the lips.

In addition, individuals with weakened immune systems may experience more severe symptoms of herpes labialis, including blister rupture and yellow crusting. If the crust persists for a prolonged period or is accompanied by symptoms such as fever or swollen lymph nodes, prompt medical attention is recommended to avoid delayed treatment. Patients should also maintain good hygiene of the lip area, avoid infection, and refrain from consuming spicy, acidic, or irritating foods that may aggravate the affected area.