Is there a link between constant fatigue and serotonin levels?

This may sound like a dumb question... But I really am unsure. What is the difference between a milk allergy and lactose intolerance? Or are they one in the same? I was in an accident when I was 14. I had emergency surgery on my liver and spleen. After about the age of 20, I have developed severe mad dashes to the restroom after eating anything dairy.

But I have a lot of sinus allergies... that seem to flare up after eating milk products. Although generally milk products do cause thickening of the mucus... I was wondering if severe congestion also goes with it? I no longer eat milk products, of course. But I recently read about a child with a milk allergy who could not breathe through his nose afterward... accompanied by severe coughing. I am now 40 and learned my lesson well... But still curious and always looking for additional info and answers!!

I get cold sores around my mouth and nose all the time; I have since I can remember. I know that they can be caused by both physical illness and mental stress. Is there any way to reduce the frequency with which I get them, i.e., diet? Please help me, I feel like a leper.

What is wrong with my face? It permanently looks sunburnt across my nose, cheeks and on my chin. Sometimes it appears worse than others. It is hot to touch and often bleeds. Typical rosacea treatments do not improve the redness or pain. I'm overweight but otherwise healthy. Thanks!

I just was diagnosed with minor scoliosis. I am 38 years old (today!). I do yoga and while at a retreat, was told by the instructor that it looked like I had a little scoliosis on the right side. I crack my back, neck, and so on. I mainly do this on my right side (the side I have minor scoliosis). I feel very tight if I don't do it, and feel better afterwards, but I just know it's wrong. I don't know if my cracking my back is worse with this problem, or if I do it because of this problem. I have tried to stop, but even when I stop for a short period of time (month), my right shoulder "pops" (not snaps or cracks like when I do it intentionally while doing certain activities, like push ups or bench press (and it will happen over and over). This also occurs on my right hip when I do things, such as leg lifts. What do you think? Will this possibly go away if I stop or are they not related?

1) I'm a young gay man, and I'm concerned about oral sex and HIV. What are the risks, statistically and in your opinion, of receiving oral sex without a condom? Also, and this will sound kind of funny, I have braces, so I'm assuming giving head is dangerous.

2) A couple of weeks ago, my girlfriend and I were having oral sex and... well, to make a long story short, my penis got "snagged" on her braces and I received a deep cut on the head. I put Neosporin on it every night for a week, but the cut doesn't seem to be healing very quickly. I don't want to go to Health Services because of the embarrassing nature of the problem.

Help me quickly, please, because it also is very painful to urinate, let alone have any sexual activity. I was also wondering if there was a risk in contracting any STDs from this occurrence. I would really appreciate any advice you can give me.