Hi,
Noted your history about recurring ulcers at the back of throat getting every 6 - 8 weeks, making eating and swallowing difficult, wants to know whether this is Sutton,s disease. Yes. many such symptoms are included as a group as Sutton's disease. The exact cause is not known but empirical treatment can help a lot. The cause may be multi-fold like 
colitis, loss of integrity of mucosa, rather weakness, deficiency of many 
vitamins and minerals, increase with 
stress and 
anxiety.
I would advise you the following in such a situation to get the following tests done:
* 
Stool test for 3 consecutive days and if anything is found to be positive then get treated accordingly
* Blood tests particularly for Vitamins A and D. Get the levels corrected if there is deficiency which is found in most of the patients.
* Try to find out the instigating and enhancing factors, foods, beverages and so on. Avoid these at any cost.
Take care. Hope I have answered your question. Let me know if I can assist you further.
Regards,
Dr. T. Chandrakant, General Surgeon