What are the symptoms of dust mite allergy?

The main symptoms of house dust mite allergy include the following aspects: 1. **Skin symptoms**: After contact with house dust mites, the skin may develop rashes, swelling, itching, and even hives or edematous plaques. These symptoms typically occur in skin areas exposed to house dust mites, such as the face, neck, arms, or waist. 2. **Eye symptoms**: House dust mites can also irritate the eyes, causing itching, tearing, and conjunctival congestion. These ocular discomforts may affect the patient's daily life. 3. **Respiratory symptoms**: When house dust mites irritate the respiratory tract, patients may experience sneezing, runny nose, and nasal itching. In severe cases, allergic rhinitis may develop, characterized by nasal congestion, intense nasal itching, continuous sneezing, and profuse watery nasal discharge. Additionally, house dust mite allergy may trigger allergic asthma, manifesting as chest tightness, shortness of breath, and expiratory breathing difficulties. In severe cases, cyanosis may occur due to oxygen deficiency. 4. **Systemic symptoms**: In rare cases, house dust mite allergy may cause systemic symptoms such as difficulty breathing and laryngeal edema. These symptoms can be life-threatening and require immediate medical attention.