I found a tick on my foot earlier in the summer and panicked and whipped it out. I must have squeezed it a bit, because the bite was very itchy and took some time to heal.
A few years back, I found one in my groin. It was after walking on an RSPB site where there are a lot of deer. I did freak out a bit
but removed that one properly. A previous one that I found down my welly, years ago was one that I had absent-mindedly picked off, thinking it was a scab.
That was quite big and I think I got it when sitting in the grass in a sheep field.
I read that you need to get them out without squashing them, otherwise you push their stomach contents into the wound. To do this, you need to have a pair of pointy tweezers that will fit round the mouthparts. The vets around here can supply you with a device that will slip under them to remove them.
There was a defunct website about lyme disease which was useful. It will not up to date but had some useful info about keeping your garden safe and other things like that.
http://www.bada-uk.org/