Chest and back pain. Be causing this?

Hello, My brother is facing some issue with his health. He is 24 years old. Earlier diagnosed with anxiety disorder. History : He had panic attacks and later diagnosed with anxiety disorder. This was around May 2014. Current: Apart from anxiety, he started to feel pain in his back for quite a long time. 2 months approx. Every time he wake up in the morning, he complain about it. But few days earlier he said he was having chest pain after he was up in the morning. He said his chest feel like a very stiff thing, sort of rock solid you might say. And then he started having this pain every morning. Some more symptoms: Fatigue, dizziness, lots of sweat in the back of his head whenever he feels uncomfortable. Can you pleaee advise what might be causing this? I mean he doesn't feel the pain all day, sometimes it's twice of thrice a day or sometime it's one time in two or three day. But it mostly happens when he wake up in the morning. All the pain.