The Silent Killer Putting South Africans at Risk

As South Africa marks World Hypertension Day on May 17, 2025, health experts are sounding the alarm on a condition often dubbed the “silent killer.” Hypertension, or high blood pressure, (1*) affects nearly half of South African adults, yet many remain unaware of their condition. This lack of awareness poses significant health risks, including heart disease, stroke, and kidney failure.

Hypertension occurs when the force of blood against artery walls is consistently too high, typically defined as a blood pressure reading of 130/80 mm Hg or higher. Often, it presents no symptoms, earning its nickname as the “silent killer.” When symptoms do manifest, they may include headaches, dizziness, shortness of breath, chest pain, and nosebleeds. In severe cases, it can lead to life-threatening complications such as heart attacks and strokes

Recent studies indicate that approximately 45% of men and 48% of women over the age of 15 in South Africa have hypertension. Alarmingly, only about 19% of men and 29% of women with the condition are aware they have it. This widespread lack off awareness emphasises the critical need for regular blood pressure screenings and public education. (*1)

Hypertension is a leading cause of cardiovascular disease, which accounts for one in every six deaths in the country. Beyond mortality, the condition imposes a significant economic burden. The total cost of hypertension in South Africa is estimated at ZAR 39.5 billion annually, encompassing direct healthcare expenses and broader societal costs. (*2 and *3)

In response to this pressing health challenge, Unu Health, a leading South African telemedicine platform, is leveraging technology to promote proactive health management. Founded by Tania Joffe, Unu Health offers user’s tools to monitor their blood pressure and overall well-being from the comfort of their homes.

“We believe that empowering individuals with accessible health information and monitoring tools is key to combating hypertension,” says Joffe. “Our platform aims to make health management a seamless part of daily life, ensuring that South Africans can take charge of their health before complications arise.”

Regular blood pressure checks are essential, especially for adults over the age of 18. Lifestyle modifications, such as a balanced diet, regular exercise, and stress management, can significantly reduce the risk of hypertension. For those diagnosed, adherence to prescribed medications and ongoing monitoring are crucial.

As World Hypertension Day approaches, it’s an opportune moment for South Africans to assess their heart health. By embracing preventive measures and utilizing available resources like Unu Health, individuals can take meaningful steps toward a healthier future.

For more information on managing hypertension and accessing telemedicine services, visit www.unuhealth.org