Im sorry to hear about your symptoms. Ive seen the pictures and it does seem like that the back of your tongue is swollen. Specifically the papillae of the tongue seem to be swollen. Now there are a few conditions which can cause this problem. One more thing which i noticed was that you also have a white coated tongue, this can be due to several issues.
the first thing which comes to mind after looking at the pictures is that you could have an infection of the tongue. One of the commonest infections here is Candida, it can cause swelling of the papillae as well as a whitish discoloration of the tongue. Usually this can be diagnosed on a simple clinical examination however in some cases a simple tongue scraping can be examined as well. It can be treated very easily with the help of oral nystatin drops which can clear up the infection within a week or so. Sometimes oral tablets may be needed as well.
Another cause can be a bacterial infection in which you can have worsening of swelling as well as pain. This would again be diagnosed on a clinical examination and treated with antibiotics.
Another cause of this can be acid reflux. The acid could be coming back up the throat and causing damage to the tongue, it can cause swelling and a metallic taste in the mouth. this would also cause burning in the chest, bloating, abdominal pain especially after eating and these symptoms could be worse at night. this would be treated with drugs like OTC prilosec.
Lastly this can be an indication of an underlying systemic disorder such as vitamin B12 deficiency however in that case mostly there is loss of the papillae however it can turn a tongue white. This would be diagnosed with a simple b12 level and then treated with replacement of the B12.
Now i would suggest that you schedule an appointment with a ENT physician and have him look into the above possibilities.
Do you have any more questions?
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