I wear shoes of all sorts, but I have three main types:

1) No shoes/slippers/sandals

2) Running shoes

3) Heeled shoes

Each has a different heel height, and I notice that I sometimes get pain in the back of my heel if I go from wearing heeled shoes for an extended period and then spend a day in slippers.

My basic question is: am I screwing up my muscle and/or tendon length or flexibility by changing shoe heel styles?

If so, what is to be done?