I have a stabbing pain in the arc of my right foot (underneath). when i walk i feel the muscles stretching as i lift my foot then when i stop walking it feels like pulsing stabs right in the middle (arc).

Plantar fasciitis : Your description is pretty typical of plantar fasciitis. Rest, icing and use of NSAIDs may help (ibuprofen, Aleve). Wearing slippers or going barefoot may aggravate symptoms or may result in a recurrence of symptoms. Thus, the first step out of bed should be made wearing a supportive shoe or sandal. Also wearing shoes with arch support may help. If you don’t get relief soon, please see your doctor