Yes, believe it or not some of us have had that pain more or less constantly for years. That is exactly why most of us have adopted a fibre rich diet and regularly take supplements such as Metamucil and Miralax (among other things). We cannot just take those supplements only when we get symptoms, because we have symptoms all the time. So for many of us the fissure diet and taking supplements has become a way of life.
Also, many of us do have periods where we are fine and then we have a reoccurrence. Usually, a recoccurrence is caused by a particuarly hard or large stool, or a bout of diarreaha. Unfortunately, that is not uncommon with fissures.
As you probably know by know from reading these discussions, the general approach is to try anything but surgery for as long as you can, and then if it appears that nothing else is working, opt for the surgery, which works most of the time. Most acute fissures (90%) can be healed without surgery. Most chronic fissures (60%) will eventually require surgery.