Hello Doctors, I am 49 years old and have hypertension since 5 years now. Got tested last week, sugar and thyroid in normal range. Since last month, twice this has happened. When I got up from bed, i e. from sleeping position, I started feeling dizzy. Today, in fact, I was feeling very low and sleepy, so I took a nap. When I woke up and got up, I started feeling dizzy. Last year, I had ecg, echo and tmt, which all came normal. BP in each of these 2 episodes was 110/70 and 110/68 (today) respectively. So, I took one 200 ml sachet ors (Walyte). I have an epigastric hernia for which I am planning operation this winter. What can lead to this? Is my life in danger? What check ups can I get done? Please advise. Regards.