I have center bottom chest pain, when i move it hurts. when i apply pressure it doesn't hurt. what should i do?

Multiple Causes: Chest pain can be a symptom of heart disease but may be may other things such as esophageal spasms, great vessel disease, respiratory (asthma, COPD, bronchitis, infections, lung collapse), and muscle problems to name a few. It really depends on the clinical situation and other symptoms you may be having. it is very unlikely that at 23 it is serious but should see a doctor to get more information