we are all students,and there is no need to explain what exams stress is: Sleepless nights,troubled thoughts,loss of appetite,nervous,all these are because of stress.it is not necessary to continue letting stress take its toll on your physical and psycholical health and it can negatively affect a person's memory.I have some techniques that help me and i hope that will
help you to reduce it. 1,believe in your self because you are capable of passing the exam ,and you would'nt have been given a place in the class if you did'nt have the ability to do it . 2-as soon as you notice you are losing concentration take a short break.go for walk, talk to a friend ,than you will feel refreshed. 3-iN THE EXAM if you can't get started ,do not panic! you have gast to make a map of your knowledge on the topic. 4-use your time wisely!. 5-Relax every 5m stretch your bach,arms,nech,and breath .than go back to the writing. THE last advise is to not staying all night befor the exam is never a good idea.so instead have an early night , keep calm and tray not to think about why you must the exam.