@ Vincent
If you have been thin for a long time you may have an entrenched tapeworm (ETW). I can't provide a link, but basically it is a rare kind of tapeworm that has a very selective diet. What this means is that the usual medicines don't work and the symptoms are not overt. It just means you can't put on weight, and this may become a medical problem as you get older and your digestive chemistry changes. Up until now the only way to get rid of the ETW has been by means of surgery. Recent developments in Australia have resulted in an ingenious method to get the ETW out. I was reading it the other day...basically it works like this:
1) You have a low residue diet for 2 days, followed by nothing the 3rd day. On the afternoon of the third day you have a blood test to see what chemistry you have (it tells them what nutrients you are lacking, which points to what the ETW is consuming).
2) On the 4th day a clinic nurse (or in your case Sioux, because she can probably follow the instructions on the kit herself) gives you a light sedative and then you fall asleep, lying on your stomach, no pants.
3) When you are asleep she takes out a squeezy tube of chocolate sauce (like the stuff you put on ice-cream, but this stuff has been mixed with a synthetic formula based on the results of your blood test). Basicaly, the stuff in the squeezy bottle is what the ETW really wants.
4) A circle of this sauce is drawn around your tradesmen's entrance, and then the lights are switched off and an ultraviolet light is switched on (the ETW will not come out in normal light, and it can't see UV glow).
5) After a while the ETW will emerge to eat the sauce and that's when Sioux can use a pair of white plastic tweezers (glow in UV) to grab the worm (who also shows up nicely in UV) behind the head and roll him up like a bit of spaghetti. It is important not to roll it too quickly or to pull, because the worm could segment and then you have to wait a few days for the pieces to be excreted.
Total cost is about £32 for the blood test and kit, and £67 if a nurse comes to do it (you can get Sioux on the case, so you'll save money there).
You may not believe it, but I was talking about tapeworms with my colleagues just the other day, and I managed to catch quite a few of them with this story, and I'm sure I'll catch a few more...