1) Allergic Asthma: A recurring difficulty in breathing caused by allergy to an external protein (such as dust mites). Wheezing, coughing, or tightness of the chest is common symptoms.
2) Hay Fever (rhinitis): Symptoms of allergic hay fever are sneezing, itching, nasal discharge, a blocked nose or congestion. House dust mites are a common cause of year round hay fever. Rhinitis can also progress to involve other parts of the respiratory tract (e.g. the lungs)
3) Conjunctivitis: Symptoms include watery, itchy, burning or redness of the eye. The eye has no mechanical barrier to stop the impact of allergens on its surface (pollen/mite droppings).
4) Eczema: Exposure to the mite allergens can increase a ‘flare up’ or cause an eruption on non-diseased skin. Test show that removing mites for mite allergic patients improves the condition greatly.