Which of the following is NOT a common symptom of foodborne illness?

High blood pressure is not commonly associated with foodborne illnesses, making it the correct choice in this context. Foodborne illnesses typically lead to symptoms that result from the body's reaction to pathogens or toxins present in contaminated food. Common symptoms include abdominal pain, vomiting, diarrhea, and headaches, which stem from irritation or infection in the gastrointestinal tract.

In contrast, high blood pressure is a chronic condition that relates more to lifestyle, diet, and other health factors rather than an immediate response to consuming contaminated food. Therefore, while it is important to recognize various health issues, it does not fit within the typical symptomatology of foodborne illness.