Dear Welcome to HCM We understand your concerns I went through your details. I suggest you not to worry much. Human body is adept to change. It should be able adjust itself to any situations. But there are some exceptions. Your case is one of it (I don t think this as psychological). To find out, visit a physician. You shall need prescription for vomiting and head ache. If you think that this condition is psychological, Positive imagery should help you. Twice or thrice daily - imagine, see yourself traveling in airplane above 4000 feet, you are perfect, smiling, cool, enjoying etc. Thoughts are there to come and that is the duty of the brain. let the thoughts come. You need to divert the thoughts to more priority ones. Means be busy and divert thoughts. Relaxation and meditation plays an important role in controlling altitude sickness. Plenty of water, oxygen and exercise most important. For more psychotherapy techniques, You can post a direct question to me in this website. Include every detail as much as you can. I shall prescribe some psychotherapy techniques to control your condition. I am sure that the techniques should be a success. Hope this answers your query. Available for further clarifications. Good luck.