When exposed to hot water, blood vessels under the skin dilate to release heat, causing blood pressure to fluctuate. In some individuals, blood pressure may rise slightly during a shower then drop rapidly. This reduces blood flow to the brain, leading to feelings of dizziness, lightheadedness, blurred vision, or a rapid heartbeat.

Individuals with long-term high blood pressure often have less elastic blood vessel walls, causing more pronounced blood pressure fluctuations and an increased susceptibility to dizziness. While this can sometimes be a normal physiological response or a side effect of medication, it should not be dismissed if it occurs frequently.

Dizziness during hot showers can also indicate underlying heart disease. Over time, coronary arteries may narrow or heart rhythms may become abnormal, often without the patient realizing it. As the condition worsens, the risk of serious complications, such as myocardial infarction, severe arrhythmias, or sudden cardiac arrest, increases. This situation also elevates the risk of falls and injuries due to slippery floors and hard surfaces.

If you experience dizziness during a hot shower along with symptoms such as a distinctly rapid heartbeat, chest tightness, shortness of breath, profuse sweating, severe blurred vision, or a feeling of impending faintness, you should seek medical attention promptly. A doctor will check your blood pressure, perform an electrocardiogram, and conduct other necessary cardiovascular tests to ensure an accurate diagnosis and appropriate treatment.

To mitigate this condition, avoid excessively hot water, limit time spent standing under the shower, and do not shower when hungry or fatigued. Monitor your blood pressure regularly, take medication as prescribed, and attend periodic follow-up appointments.

Master, Doctor Duong Thi Thao

Department of Cardiology

Tam Anh Cau Giay General Clinic