Hi Pol...
Let me relieve Hat for this one... Respiratory acidosis CAN be a serious condition, but only when there is an underlying condition causing it, such as a blockage preventing the oxygen conversion in the lungs, or sometimes an abnormality in the blood.
However, the symptoms can also occur from not breathing correctly and so forth, which is why you have the symptoms. So it is kind of like having a severely bruised foot... which feels like it is broken, and therefore you are walking in such a way as to compensate the injury.. but whilst you are doing this, it can seem as though it is broken.
You are doing the same here with the acidosis. Does that make sense?
Hat - please correct me if this is too tangential.
IUN