Perhaps the most important part of the survey process is the creation of questions that accurately measure the opinions, experiences and behaviors of the public. Accurate random sampling and high response rates will be wasted if the information gathered is built on a shaky foundation of ambiguous or biased questions.
However, if you have pollen, fiber, food or other allergies then swollen tonsils might occur alongside other familiar symptoms. In some cases this will subside after a few hours. However, if your allergy triggers a serious reaction, it may swell the tonsils and throat to a point where they restrict breathing.
Other Causes. Food allergies sometimes cause headaches and fatigue after eating. For example, people with milk allergies might develop a headache after eating yogurt, butter, cream or cheese. The body releases the chemical histamine during an allergic reaction, which causes sinus cavity swelling. This inflammation leads to headaches.