My arch is swelling and it has sever pain in it . what is the reason behind it ? it can't even stand properly .why?

Plantar fasciitis : Can cause pain and swelling in the foot arch but variety of other possibilities including circulation or nerve problems or bony problems such as arthritis. Needs a doctor examination as may need tests run to try and sort it out. All the best

Arch pain treatment: You could have plantar fasciitis, a foot sprain, a stress fracture or a pulled muscle. Try resting, icing, compressing and elevating. You could also try rolling the bottom of your foot on a tennis ball to alleviate pain. You could also try arch supports and decreasing physical activities that cause the pain. NSAIDs can help alleviate the pain and inflammation.