Reading some of these posts has me wondering about the possibility of a correlation between tight connective tissue (also called fascia) and the tendency for one person's body to leak in one area while another person may leak more in another area. I'm thinking specifically of a correlation with leak-related headaches.
Fascia wraps every bone, every muscle, and every single muscle cell. It's very thin, kind of like Saran Wrap. If you've ever cut up a whole chicken, you've likely seen it covering the different pieces of meat. Veins, arteries, and lymphatic vessels have to travel through fascia to get to the cells they feed. If the fascia is tight, it constricts those vessels.
I'm a massage therapist and I have a number of clients who have had chronic circulation issues in their lower legs. I have found that their fascia is extra tight in those areas, and that slow, focused massage to get the fascia to loosen up allows circulation to flow more normally. Their legs change from looking chronically bruised, with dark blue capillaries visible, and even some swelling and a few veins that look varicose, along with being cold to the touch, to their legs looking much more normal in color, less swelling, more normal body temperature. This includes a couple of clients who have been to various doctors and even had their veins assessed by vein specialists who could not find a problem with the veins themselves. Tight muscle and fascia is not something the medical community looks at much, and so are an area of health that we lowly massage therapists are actually more expert in :)
Over time, the improvements last. Massage can have a lasting impact on tight connective tissue.
I'm thinking specifically of those who experience a lot of headaches and even swelling in the neck along with SCLS attacks. It may be that tight connective tissue in the head and neck (or elsewhere) is contributing to fluid build up in those areas. If you can find a massage therapist who is familiar with working with fascia (techniques often called "myofascial release"), it may help relieve some of those symptoms. Of course I don't think it would change the likelihood that you will leak, but it may relieve the tendency of the fluid to build up in the head and neck, and that may reduce the amount of headache you have to suffer with.
You can test yourself to see if your fascia is extra tight. Put your hand on the area you want to check. Using a light touch, move the skin back and forth. Normal fascia will allow your skin to move freely back and forth over the bones underneath it. Tight fascia will make your skin seem almost glued in place over the bones - it won't be able to move much, although it will loosen up if you keep trying to move it. There are also deeper layers of fascia connecting muscle to bone, and in between layers of muscle. All these different levels can get tight or adhered to each other. You can find different levels of tightness in different areas of the body. Dehydration also contributes to tight fascia (and often to headaches).
At the very least, massage relieves stress and never causes harm when done properly, so it can't hurt to try :)