My other half has been suffering really really bad the last couple of days with lower back pain, he's 6'3 and he's a skateboarder so he is bent over quite abit. He says it hurts to sit it hurts to bend and I've never seen him in pain like this he has to lay on his stomach to be comfortable  /: it's concerning me is it due to height, skating or another problem ? He's been skating for years and has never had this problem before this bad