since you stand for a long period of time the whole body weight comes on your back. few things you have to be marked :wear good shoes-your shoes should be comfortable and have cushion effect on heel area this will helps you to distribute your body weight equally(sports shoes of good quality works better) : while doing hair-dressing make sure you are not bending too much forward the angle of chair should be at your shoulder level so that no forward bending happens. :take breaks interval in your working hrs continous standing can hamper your spine :apply hot packs for 10-15 mins where you find stiffness :do whole body stretching exercises daily and walk also :apply a good ointment if there is spasm or swelling : use firm mattress while sleeping : take side turn while getting up from bed : get lil ultrasonic therapy on that area you will feel better take care of your health.