Strange sensation in big toe

[stepitupjuan]

My 16 yo is complaining of a strange sensation in his big toe. He can't really describe other than to say if feels like liquid under the skin and I touched the toe when he curls it up there's what I can only describe as a rippling feeling under the skin. The other toe doesn't have this. I can't get gp app till next week but is it something a physio or similar could look at? Does it sound familiar to anyone?

It's not painful as such but the sensation is irritating him and of course at 16 there's an element of drama to the situation! No visible injury and he's done nothing sporting wise to damage it. Thanks