When we feel intense stress or fear, a hormone called adrenalin is secreted from the adrenal glands, which are situated above the kidneys. Our heart beats faster, our blood pressure rises, and our muscles tense up. At the same time, our breathing quickens, and the blood sugar levels rise to provide us with instant energy. This is what is known as the "fight or flight" response, and signals that our body perceives danger and is getting ready to deal with it.
The problem is that in our modern lives, factors such as job pressures and emotional ups and downs sometimes cause us to live in a state of stress for long periods, which may have consequences for both our physical and mental health.
Everyone reacts to stress differently and has a different tolerance level. The way that stress manifests in your body depends on things like your genetic make-up, diet and exercise routine, and physical surroundings.