Pec implant pain 6 years after surgery - what is going on?

Since my pec implant surgery in 2017 every couple of months I always get a pinch and stinging pain deep in my l armpit where the edge of the implant painful touch. It’s never followed by anything it just goes away but I’m Always got a sore armpit for a week. it feels like a pimple thats about to pop but there is no pimple. only the feeling of one. i dont get any redness swelling only a ache thats painful. im hoping drs could know whats going on.