Hypertensive patients can eat watermelon, but in moderation, do not eat too much, especially combined with diabetes patients, is not recommended to eat watermelon. At present, China’s blood pressure standards are: normal: systolic blood pressure <120mmHg, diastolic blood pressure <80mmHg; high normal: systolic blood pressure 120～139mmHg and/or diastolic blood pressure 80～89mmHg; hypertension: systolic blood pressure ≥140mmHg and/or diastolic blood pressure ≥90mmHg, applicable to adults over 18 years old. Hypertensive patients need to maintain a low-salt and low-fat diet, and can eat fresh vegetables and fruits daily to supplement potassium. Watermelon is rich in potassium, vitamins and fiber and can be consumed in moderation. However, it is important to note that because watermelon is high in sugar, especially in patients with diabetes, it may cause fluctuations in blood glucose and fluctuations in blood pressure, which is not conducive to blood pressure control. It is recommended that patients with hypertension regularly test their blood pressure on a daily basis, follow the doctor's instructions for standardized treatment, and consult a doctor in case of discomfort.