Background Hypertension is currently one of the major risk factors of cardiovascular diseases. Level of blood pressure fluctuates over a 24-hour cycle. Depending on the incidence of daily blood pressure rhythm disorders, or a lack thereof, we can distinguish dipper and non-dipper profiles. Material and methods The analysis covered medical documentation and a 24-hour blood pressure rhythm monitored by the ABPM system in selected 130 patients with diagnosed arterial hypertension, aged between 18 and 87, hospitalized in the years 2010-2014 in the Internal Medicine Department. Results It was found that hypertension frequently occurred in obese patients, with carbohydrate metabolism disorders, hyperlipidaemia and thyroid diseases. A significant correlation was observed between dipper hypertension and hyperlipidaemia, as well as between non-dipper hypertension and smoking. Conclusions Non-dipper type patients constitute a quite varied group in terms of concurrent diseases. These patients should be actively monitored for specific chronic illnesses.