<s>[INST] hi, im 16 years old and training to be a hairdresser which means i spend 8 hours a day on my feet.. is there anything i can do to not feel so stiff? (upper back - half way down is the worse) .. and is there anything i can take for fluid in my needs?.. iv suffuered in the past but nothing worked.. meaning everything my doctor gave me was just temporary  and the problem came back (not as bad but sometimes i get really tired because of my job.. any suggestions? [/INST] 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 help you to distribute your body weight equally(sports shoes of good quality works better): while doing hair- Chat Doctor. take breaks interval in your working hrs continuous 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 little ultrasonic therapy on that area you will feel better take care of your health. </s>