Under normal circumstances, potatoes and bananas can be eaten together, but it is important to pay attention to the intake, as both are foods with high potassium content. If large amounts of potatoes and bananas are consumed at the same time, they can easily lead to hypotension as well as hyperkalemia. Patients with hypertension use potatoes as well as bananas in moderation to help discharge excess sodium ions from the body and stabilize blood pressure. Bananas contain magnesium and can promote the absorption of calcium in moderation, but they also have a high dietary fiber content and are not recommended during diarrhea. Bananas are not recommended to be eaten with cold foods such as watermelon, pear and cantaloupe, which can easily lead to diarrhea symptoms in people with a cold spleen and stomach.