The Symptoms of Motion Sickness
The classic image of motion sickness - and in particular sea sickness - is someone being violently sick. However, there are several degrees of motion sickness...
... ranging from mild discomfort and a little queasiness through to intense and repeated vomiting. Additionally, some sufferers develop severe headaches. Most sufferers find that the symptoms come in waves.
The onset of motion sickness is generally marked by a vague feeling that something isn't right, followed by a strange taste in your mouth, more saliva than usual, and a tightening around the lower jaw and upper throat. You may find yourself yawning a lot and feeling weak and short of breath. Your skin may go pale (or the proverbial 'green'), and as your body diverts blood away from the surface of your skin you break into a cold sweat.
Dizziness typically follows, then nausea, culminating in active vomiting. The intense nausea and repeated vomiting can be completely debilitating. As noted above, suffers may also develop a headache (often intense). Rarely, and only in the most severe cases, the dizziness progresses to breathing difficulties and fainting.