6. Headache (Head Discomfort)
Some individuals with food poisoning experience headaches. These headaches can result from various factors, including dehydration, electrolyte imbalances, the body’s immune response, and the release of certain chemicals in response to infection. Dehydration, in particular, can lead to reduced blood volume and less efficient delivery of oxygen and nutrients to the brain, potentially causing headache symptoms. When harmful pathogens or toxins from contaminated food are ingested, the body’s immune system may mount an inflammatory response to combat the invaders. This immune response involves releasing various chemicals, including cytokines, which can affect different systems in the body. Inflammation in the blood vessels and tissues around the brain can lead to a headache.