I had an ear infection 3 weeks ago, and i have had a swollen lump on the inside on my forarm where the crease is where the elbow bends. gp said it was just an itch but isnt there lymph node there?

Yes there is: Yes, yhe epitrochlear region has a lymph node. If it persists, get it checked.

See below: There are lymph nodes located on the inner (media) aspect of the forearm/elbow. There are not usually enlarged unless you had an injury on your arm lower below where the node is, however, they can be associated with other issues. I would recommend seeing your doc again for a recheck and possibly a CBC looking for abnormalities in the white cells. Good luck.