My question is quite similar to the posting from Dec. 23 2012: headache after vomiting. My 13 yr-old son vomited an hr ago and began yelling with headache pain that came on suddenly/immediately after vomiting. He had no headache prior to vomiting.In 2010 he had surgery to drain an arachnoid cyst that filled about 2/3 of his left frontal cortex. He has had chronic headaches before and after his surgery, always focussed right above his nose. He said this headache pain was the worst ever and covered his entire forehead. He has no other symptoms and headache pain subsided for 45 minutes, down to a 4 (1-10). Then he fell asleep, is sleeping now. What would you recommend we do? Thank you! I ve never seen this website before. Mike