Lately i have been experiencing a tightening of my ribcage. This usually happens after i eat. The first time i had it happen was when i was anorexic for a short amount of time. within 3 weeks i was eating right again and i did not feel the tightening of my ribs as much. My ribs have been tightening alot lately but i eat at least 2 meals every day. Along with the tightening i feel woozy and i have backpains. The backpains have lasted for a while but every so often they go away. With me being woozy i tend to blackout, for a few seconds my sight goes away but seconds later it comes back. im not sure if this is connected at all but i have athsma and the last time i had an attack was a year ago. I don't understand what is happening and i would like to know what is wrong. Please help me.