Speaking to BBC Sport as part of their State of Sport investigation, Mills recalls the six-month period where he received painkilling injections.
“I’ve been in many dressing rooms where I’ve seen other players be pressured into playing, myself as well,” said Mills.
I had painkilling injections in a broken toe for six months. One before the game, one at half-time and then I would wake up around midnight screaming in agony as it wore off.
“It was my choice. I wanted to do it. But was it good for me? Probably not. Might it cause arthritis. Possibly.”
The ex-Leeds and Manchester City defender also believes players in the lower leagues face this issue on a more regular basis.
Read the full article on eurosport.co.uk: Players pressured into using painkillers – Mills