Itchy ears turn red when scratched

Itching in the ears that turns red upon scratching may be caused by physiological factors or pathological conditions such as insect bites or allergies. Appropriate treatment should be based on the specific cause, as detailed below:

I. Physiological Factors

If the surrounding environment is cold and there is a sudden change in temperature, the nerves in the ear may experience abnormal stimulation, leading to increased local blood circulation. This can result in itching and redness when scratched, which is a normal phenomenon. It is recommended to keep the ears warm in daily life to prevent frostbite.

II. Pathological Factors

1. Insect Bites

In damp environments where insects breed abundantly, toxins from insects may be injected into the skin through their mouthparts upon biting. This can cause local soft tissue congestion, swelling, and redness. The toxins may also abnormally irritate the local mucosa, resulting in the aforementioned symptoms. It is recommended to apply soapy water or essential balm (e.g., Fengyoujing) to the affected area to relieve itching.

2. Allergy

The skin of the ear is highly sensitive. Excessive sweating or frequent contact with water may cause moisture to remain on the ear's surface, creating a damp environment conducive to microbial growth, which may trigger an allergic reaction. This alters the permeability of blood vessels in the ear and increases inflammatory mediators, leading to the observed symptoms. Patients are advised to take antiallergic medications such as loratadine tablets or cetirizine hydrochloride tablets under medical guidance.

In addition, this condition may also be caused by other medical issues such as foreign bodies in the ear canal, otitis media, or urticaria. It is recommended to maintain good environmental hygiene and protect the ears during swimming to prevent water from entering the ear canal.