Low blood pressure and dizziness in men may be caused by drug factors, severe diarrhea, hypothyroidism, physiological factors, etc. Different treatments are adopted according to different causes, including adjusting the dosage of drugs, rehydrating fluids, oral thyroxine, and enhancing physical fitness. 1. Drug factors: male hypertensive patients in the use of antihypertensive drugs to lower blood pressure, due to antihypertensive drugs dose is too large and antihypertensive treatment program is unreasonable, resulting in too much lower blood pressure, causing low blood pressure and dizziness, the patient should go to the hospital in a timely manner to adjust the dosage of medication or change the drug. 2. Severe diarrhea: Severe diarrhea will lead to insufficient blood circulation in the body, causing insufficient cerebral perfusion, resulting in low blood pressure and dizziness, and should be treated with rehydration therapy in a timely manner, the use of levofloxacin, cephalexin and other anti-infective drugs for the treatment of intestinal infections, to alleviate diarrhea. 3. Hypothyroidism: Hypothyroidism will lead to a decrease in the secretion of thyroid hormones, causing a decrease in the contractility of the heart muscle and a decrease in the pumping function, resulting in low blood pressure and dizziness, which can be treated by supplemental thyroxine. 4. Physiological factors: If you are usually thin and weak and have low blood pressure, you need to strengthen nutrition, drink more water, and usually exercise more to strengthen your body. If there is any discomfort, you should go to the hospital in time to improve the examination and give targeted treatment after clarifying the cause of the disease.