Many hypertension patients may suffer from fluctuation of blood pressure even they keep taking pills. They often experience lower blood pressure in spring and summer than in autumn and winter. What causes this seasonal change?
“Blood pressure is significantly associated with season. In terms of the rule of seasonal change in China, people will experience higher blood pressure between October and May. During the period June-September, the blood pressure is generally lower. Blood pressure is greatly affected by blood vessel expansion and contraction, although there is no change in the blood volume of vessels. In the cold days, the vessels will contract so the blood pressure rises while in the hot seasons the blood vessels will expand to release heat. People may experience excessive sweating and declining blood pressure.” Chief physician of Clifford Hospital, Professor Wang Junchang, explains.
Professor Wang also suggests hypertension patients to be more attentive to the dosage of hypotensor. The dosage should be adjusted based on season and climate changes. The adjustment of dosage should be guided by doctors and patients should monitor their blood pressure.