It might surprise you to learn that biological stress is a fairly recent discovery. It wasn't until the late 1950s that endocrinologist Hans Selye first identified and documented stress. Symptoms of stress existed long before Selye, but his discoveries led to new research that has helped millions cope with stress. We’ve compiled a list of the top simple ways to relieve stress.

Listen to music
If you're feeling overwhelmed by a stressful situation, try taking a break and listening to relaxing music. Playing calm music has a positive effect on the brain and body, can lower blood pressure, and reduce cortisol, a hormone linked to stress.

We recommend cello master Yo-Yo Ma playing Bach, but if classical really isn’t your thing, try listening to ocean or nature sounds. It may sound cheesy, but they have similar relaxing effects to music.
Call a friend
When you’re feeling stressed, take a break to call a friend and talk about your problems. Good relationships with friends and loved ones are important to any healthy lifestyle, and they’re especially important when you're under a lot of stress. A reassuring voice, even for a minute, can put everything in perspective.

Talk yourself through it
Sometimes calling a friend is not an option. If this is the case, talking calmly to yourself can be the next best thing. Don’t worry about seeming crazy — just tell yourself why you're stressed out, what you have to do to complete the task at hand, and most importantly, that everything will be okay.
Eat right
Stress levels and a proper diet are closely related. When we’re overwhelmed, we often forget to eat well and resort to using sugary, fatty snack foods as a pick-me-up. Try to avoid sugary snacks and plan ahead. Fruits and vegetables are always good, and fish with high levels of omega-3 fatty acids have been shown to reduce the symptoms of stress. A tuna sandwich really is brain food. 

Drink tea
A large dose of caffeine causes a short-term spike in blood pressure. It may also cause your hypothalamic-pituitary-adrenal axis to go into overdrive. Instead of coffee or energy drinks, try green tea. It has less than half the caffeine of coffee and contains healthy antioxidants, as well as theanine, an amino acid that has a calming effect on the nervous system.
Exercise (even for a minute)

Exercise doesn't necessarily mean power lifting at the gym or training for a marathon. A short walk around the office or simply standing up to stretch during a break at work can offer immediate relief in a stressful situation. Getting your blood moving releases endorphins and can improve your mood almost instantaneously.
Sleep better

Source​ ៖ www.shealthline.com