Sweating while eating can be caused by dietary stimuli, environmental factors and hyperthyroidism. 1. Dietary stimulation: If the food you eat is too hot or too spicy, it causes vasodilation and increased peripheral blood circulation, which can lead to sweating while eating a meal. 2. Environmental factors: in the hot summer meal, because the temperature itself is very high, coupled with the meal is hot, so the meal will make people’s body temperature rises, the body will be in order to cool down and sweating, resulting in eating a meal are sweating phenomenon. 3. hyperthyroidism: hyperthyroidism patients will appear multi-system excitability and hypermetabolism of the situation, so will eat a meal are sweating. If you are sweating profusely even after eating a meal, it is recommended that you go to the hospital in time to clarify the cause and receive treatment according to the situation to avoid adverse consequences.