Allergic reactions caused by dander generate a variety of symptoms, including:

• Itchy eyes and nose
• Nasal congestion
• Headache
• Fatigue
• Hives
• Coughing
• Wheezing
• Shortness of breath

The severity of allergic reactions to dander varies between patients. In rare cases, an allergic reaction may progress to a severe and potentially deadly allergic reaction known as anaphylactic shock. This requires a visit to the emergency room, especially in the case of severe breathing difficulty.