Hyperventilation is a symptom not a syndrome. This means that the same problem can have many different causes including a variety of brain and respiratory problems that can need more specific treatment than “breathing” exercises. Accordingly, be sure to talk this over with your doctor, or if you are an out-of-town student, be sure to talk with the doctor at your student health center. Having said this, usually hyperventilation is related to a disorder we call “Panic Disorder.” This unfortunately is a very bad name, as people who suffer from it do not always experience panic-type feelings. In fact, we think that it is a disorder of the very deep part of your brain that regulates your breathing. This leads to frightening, but not harmful “suffocation false alarms,” in some people triggering feelings of panic, but in others just leading to intense feelings of “smothering” with all the associated body symptoms, including numbness and “pins-and-needles” tingling of hand, fingers and lips. Excessive caffeine can certainly make things worse and you are right to cut back. The breathing exercises for hyperventilation are designed to have you breathe slowly, regularly, gently, and smoothly. Always try to breathe in through your nose and breathe out through your nose, if possible. If you need to breathe through your mouth, imagine that you are breathing in and out through a straw by “pursing” your lips. Try to imagine a slow “sine” wave (get out your old math books to see what I mean) and have your breathing pattern match that pattern. This slow regular breathing is most important. If possible, and you know what this means, also work at breathing using your diaphragm rather than your upper chest. You often can get help with this type of breathing by taking an introductory yoga class or checking out a videotape on yoga that focuses on breathing and relaxation. For some people with panic disorder as the cause of their hyperventilation, treatment with certain anti-depressant medications can be helpful, even if they do not feel depressed. The bottom line is that even though the cause of hyperventilation may technically be in your head, this is not an “all in your head” problem — you have a real problem based in altered physiological function. Best of all, this is a problem that can be treated successfully, so do not hesitate to seek out good help.
Sigh, hate illnesses you can't SEE and TOUCH then you don't panic as you know they are there, but the not knowing is the worst bit. Maybe I'm just nuts :)