<s>[INST] Can an allergic reaction trigger asthma? [/INST] Yes. Once you are sensitised or allergic, both indoor and outdoor allergens can cause asthma symptoms and attacks, as well as other allergic symptoms such as sneezing or a runny nose. It is therefore important to consider whether your asthma is caused or worsened by allergens.Exposure to even small amounts of airborne allergens can cause asthma symptoms. Repeated exposure may not only provoke symptoms, but may also be a cause of long-term (chronic) inflammation in the airways.Proper advice about which allergens and environments you should avoid can only be given after talking to your doctor and often after you have been tested for allergies. Source: Ginasthma. Link: https://ginasthma.org/about-us/faqs/. Field: Lung Disease. Disease: Asthma </s>