Being fiery and expressing negative emotions can lead to long-lasting good health, according to researchers.
In contrast, the British characteristic of self-restraint can have serious repercussions for physical and mental well-being, they said.
Researchers at the University of Jena in Germany assessed more than 6,000 patients and found that those who internalised their anxiety suffered from a raised pulse, the Daily Mail reported.
In the long run this results in high blood pressure and an increased chance of developing a wide range of illnesses, from coronary heart disease to cancer and kidney damage.
The research by Marcus Mund and Kristin Mitte identified a group of so-called ‘repressors’ who were particularly at risk.
According to Mund, these people are distinguished by the way that they attempt to conceal outward signs of fear, and also by their defensive behaviour.