Ok...so I'm just going to
Ok...so I'm just going to type this as if I was talking to you guys if you were a patient in my office - so I'm not going to look up any official definition of a trigger point or anything like that. So a trigger point is going to feel like there is something tight and out of place in the muscle. We sorta call it a "bundle" - there's some inflammation in there and the muscle fibers are not all uniformly going in the right direction. You may have lots of sore muscles but that doesn't mean there's necessarily a trigger point in there. I'm sure that's confusing, but I don't know a better way to say it. Often if you're on the correct trigger point the pain where you're hurting will greatly diminish or even go away. *Remember, I never advocate actually treating the exact area where you have pain. So if you have heel pain you should not be treating that pain directly but working on the muscle such as the tib posterior or the calf muscles. - These I show in the video.
Now, you may not even have a trigger point that needs to be treated. You see, trigger points occur from muscle imbalances and those muscle imbalances are a reflection of some problem somewhere else in the body. So if you're overtraining, for example, then you're going to have a weakness in the posterior tibialis muscle leading perhaps to PF. This may or may not create a trigger point in the muscle. If it did, and you eventually resolve the overtraining issue, then you will have to work out the trigger point to fix the PF. But if there's no trigger point and you resolve the overtraining then your PF will go away then.
Same would be true if you were wearing the wrong type of shoe. The muscle imbalance may create a trigger point that needs to be corrected even after you're in new/correct shoes. Sometimes they go away on their own, sometimes not.
In a nutshell, that's how it all works.. Hope that helps.