I'd put money on a doctor labelling it as "idiopathic dysesthesia", which simple means 'an abnormal sensation of unknown origin' (a.k.a. "I haven't really got a clue").
Such burning sensations can be caused by a minor allergic reaction, anxiety, a compressed nerve (leading to 'mononeuropathy') and many other things.
I'd also put money on a doctor saying "It'll probably clear up spontaneously. Just keep an eye on it and let me know if doesn't get better, or if you experience any other symptoms".
[Buenchico now retires and awaits Sqad's scathing comments!]