Vomiting on long haul flight

Dear Mr Lim,

I love reading your blog and I recently bought your book from AirAsia. I have some questions and hope that you can help me.

My son is 12 years old. We travel a lot every year. He was ok flying long haul since he was a child until when he reached 9 and started vomiting non-stop during flights.

On many occasions, he even starts vomiting before leaving the house, then non-stop pre-boarding and during flights.

He seems to be ok for short haul flights (maybe up to 3 hours). We are still traveling nevertheless. He likes to travel but the constant vomiting really annoys us.

My questions are:

1) What causes vomiting in the flight? (He does not have any motion sickness).

2) How to overcome the problem? Are there any medications or exercises that can reduce the vomiting?

3) Malaysia Airlines nowadays do not carry sufficient sick bags, so we bring our own. Can we report to this to the air safety authority for violating any rules?

4) They even wanted us to throw the sick bags ourselves into the toilet waste bin. In long haul flights, there are always long queue for the toilets. Is there any other ways of getting a better service? (We only fly coach)

And last question: How to get an autograph from you on your book?

Thanks!

Chan