### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
i have a numbness on one side of my mouth and the tip of my tongue for 1 week. Im generally fit.i also have vitiligo on my face but its not too noticeable as im quite fair skinned. I suffer from constipation at times, fatigue, hair thinning, small seconds of palpatations and i find it very difficult to lose weight. i run/cycle about 40-50km per week for 2 months and have lost virtually nothing. i am watching what i eat.my recent thyroid bloods in july were ok and there was no anemia. there are nodules on my thyroid but only yearly scans were suggestedi took part in a duathlon a couple of weeks ago and got pins and needles oin my left arm . i think this was due to tensing up as i felt fine. could the numbness in my face be due to nerve entrapment from the run?any suggestions

### output:

Hello, Thank you for your question. I understand your concern. In my opinion the symptoms you describe are not due to a nerve entrapment. The nerve (the Trigeminal nerve) responsible for the sensibility of half of your face, is responsible also for the sensibility of half of the tongue (same part) and not just the tip. Your symptoms are not suggesting a nerve entrapment. But I think that after having excluded anemia and thyroid disorders, a neurological examination followed by a brain MRI should be done to exclude another disorder like Multiple Sclerosis. Nothing to worry about. This could be a less probable diagnosis, but it is necessary to be excluded. In my opinion the more probable cause could be psychological, but you have to exclude other causes to get to this conclusion. Wish to have been helpful ! Best Wishes, 