Since I was a child, I always suffered from seasonal, dust and cat allergies. The symptoms are the typical sinus congestion, sinus pressure, fatigue, itchy eyes, itchy nose, watery eyes, etc.
What are allergies? (Cleveland Clinic, WebMD )
Allergies are the immune system’s abnormal response to a foreign substance. People who have allergies have an immune system that reacts to what is normally a harmless substance and causes the immune system to react as though it were harmful.
What are some symptoms of allergies? (WebMD )
