Can oregano oil cause high blood pressure?

Not really, oregano essential oil contains a compound called ‘carvacrol’ which is known to lower high blood pressure. However, breathing in oregano oil through steam inhalation can increase the heart rate and thereby raise the blood pressure level. Therefore, it is essential to seek medical consultation if you have high blood pressure and are starting to use oregano oil.

Oils make you fat which is one cause of high blood pressure but I wont confirm anything here since I am looking for a reply too

People do use essential oils for high BP in some places so best thing to do is dont over do anything when it comes to these oils