I thought I was the only one who experienced this strange injury until i started searching the web. The weird thing is I can go months of hard exercise (mainly running) and have no pain, and then - without notice WHAM! - it feels like I get stabbed deep in the calf and I hobble home. I have generally been able to recover in one week or so, but it is frustrating to say the least
I found this gem on the web and this runner described my problem quite well, as well as how he treats it. I hope it is found useful by anyone who is interested.
Calf Muscle, Muscle, Pain, circulation, Strength, Flexibility,
I also found an article that suggests the following regarding self-massage in this case:
"Most massages don't get to the soleus muscle or the tibialis posterior muscle, both of which are under the thick gastrocnemius muscle that forms the calf. You can treat them with your opposite knee, which is most effective at reaching this spot. The problem with stretching when there is a knot in the muscle is that stretching won't release the knot, and it will actually make the spasm more complicated while overstretching the fibers on either side of the spasm. You really need to release that spasm first. The most effective way is direct pressure onto the spasm, and hold it for 60 seconds."