Sitting at your desk all day can lead to back problems, especially if you have bad posture. There are some things you can do to help relieve the aches and pains associated with prolonged sitting.
When sitting at your desk, what is your posture like? Do you slouch over while you work? Sitting straight is very important, as is having back support. Your shoulder blades, lower and mid back should all make contact with the upright support of your office chair.