tUrRrRa

I used to get shin splints when I first started jogging since I wasn't used to it. <removed> see if you think that sounds like what you have. I would suggest stretching your shin muscles out before and after your walking routine. I like to point my toes and flex to stretch out these muscles, and there are lots of other good ones. Most likely, you are getting this from the hard ground outside, which is tougher than a treadmill. Try stretching, walk a little bit less if you need to while the pain is there, and eventually your muscles should get used to it and it should stop. Also, make sure you have good shoes! If the pain doesn't go away, of course I would see a doctor about it. I've had some odd pain in my legs (not the shins though) that happened out of nowhere and have had to stop running temporarily, but running is tougher on your joints than walking anyway! Just take it easy and do lots of stretching. Some people also ice their muscles, but I haven't tried this. You can always look into it if you are interested. I also find that massaging my shins helps too, although it can be painful (as well as the stretching) when the shin splints get pretty bad!