Im having a weird dull spasming on my left side udder my rib cage its really uncomfortable and seems to help a little by standing up. and gas?

Muscle spasm?: Could be gas, but I have also seen many complaints like this over the years that were due to muscle spasm. Commonly described as pain and a lump that goes down with self massage. Sounds like a hernia, but there are no hernias in this location not associated with a prior operation. Try anti-gas over the counter meds first and see if they help. See your doc if no help. Hope this helps!