What you are confused about is the difference between die-off and allergies.
Allergic reactions typically happen immediately after eating a food item, and it comes in a variety of symptoms such as headaches, tremors, heart palpitations, bloodshot eyes, and the leaky gut “burn” feeling I’ve described over and over on the forum that is similar to “indian rug burn” but throughout the whole body. This typically lasts for a short period of time for a few minutes to a few hours or half the day.
Die-off symptoms are caused by dying candida and are very similar to allergic reaction symptoms and feel just about the same. The only difference is that die-off lasts persistently throughout the day and you feel quite a bit worse than an allergic reaction (typically it includes flu-like symptoms). It typically increases shortly after a dose of antifungals. Symptoms include brain fog, dizziness, vertigo, headaches, irritability, flu-like symptoms, bloodshot eyes, etc. There is some overlap as you can see.
I’ve touched on this subject a few times on the forum, so if you did a “search” in the upper right hand corner on the main page you can see other posts about it.