Why does an inflamed preauricular sinus become very itchy after applying medication, and what should I do?

Itching after applying medication to an inflamed preauricular sinus may be related to factors such as irritation from secretions, drug allergy, or contact dermatitis. Treatment can be carried out through daily care and medical interventions. Specific analyses are as follows:

1. Secretion Irritation

When a preauricular sinus becomes inflamed, it may produce secretions. If these secretions come into contact with the skin, they can cause irritation and lead to itching. Patients should promptly clean the secretions to help relieve symptoms.

2. Drug Allergy

If the medication applied around the preauricular sinus contains allergens, it may trigger allergic reactions such as skin itching. Under a doctor's guidance, switching to another medication can alleviate the itching.

3. Contact Dermatitis

If contact dermatitis is present, the release of inflammatory mediators may stimulate nerve endings, resulting in skin itching. Patients may take medications such as loratadine tablets or cetirizine hydrochloride tablets as directed by a physician for treatment.

In addition to the common causes mentioned above, persistent itching may also be associated with recurrent infections, urticaria, or eczema. If symptoms persist without improvement, patients should seek timely medical attention at a hospital.