HEADACHES...

I was traveling from Aswan to Cairo in Egypt. 13 long hours, comfortable seat. air conditioned.
Still long.
Halfway the train stopped somewhere, it turned out to be Sohag, a college and university town.
There was a seat free beside me, across the middle path too. A girl came looked, hesitated, asked without words just with gestures which of the two seats was free. Both of us signaled to her that the seat was free, she sat down beside me. 
She started to talk in hesitant English to me, as if she knew that language in theory but was not used to speak it. 
It turned out she was a college student halfway between 18 and 19, bright. She liked to talk. I am somewhat older than she, the man across the aisle was somewhat more her age, so she talked to him from time to time. Each of these times, she said to me: excuse me, or: just a minute, each time also she turned back to me, fascinated a bit, I think, to talk to an older man, a foreigner, who was willing to talk to her without talking down. 
After an hour or 2, she told me she was not at her best, she had a headache. For some reason that drew my attention, as I have in a professional way more than somewhat to do with people suffering from headaches.
So I asked her if that happened more often to her. She said yes, if she was too busy.
So I told her some people can stop their headache instantly, by going top the toilet, put their finger in their throat and vomit, and then yell as loud as they could during the vomiting. I said also that I thought she would not do it in the train, she said she would try it out at home. After some time she excused herself again and went to the toilet, looking more and more miserable. She came away from there; I had not heard any yelling, so I figured she would not have dared to do it. There came along a member of her family, she started to talk to him also, but not until she had said excuse me to me again. \ The conversation with that man petered out, she turned to me again, and talked to me a bit. Then she started to look really miserable and turned away from me without saying: excuse me! to me again. After sitting there without talking for about five minutes she turned to me again. So I said to her: I a, really very angry at you because you did not say: excuse me, to me, this time as you should have done.
She looked very surprised, turned away from me a bit, started laughing and put out her right hand to me. I shook hands with her, also laughing, and I said to her: the headache is gone, isn’t it. Because I firmly believe that a person with pain cannot laugh. She looked very surprised and said: yes it is gone, as if she could not believe it. 
Suddenly she acted as if she felt very safe with, me she looked at me from time to time but did not talk much. She looked as if she was very tired which I could believe because she had done a great deal of work in changing a habit: that of acting always very proper to all people. 
When we were in Cairo, she was met by her aunt but she looked back at me as if she did not want to leave me.