The normal BP is120/80 .And usually in youngsters It will be varying sometimes lower or higher a little than the above said rate.It may be because of any sudden tension/stress ,lack of sleep due to studies/job or due to intake of more salty food ,junk food etc. There is no need to worry , your BP is normal.
Next Steps
you can consult me online for any quiries.
Health Tips
Try to avoid junk foods.drink plenty of water,sleep well.