Itchy scalp following removal of lipoma on forehead.

Hi - I had a pea sized lipoma removed from my left forehead about 1 inch below the hairline on 1st August - recovery was fine leaving only a small scar, but ever since I have had an intermittent itch around my scalp, which sometimes (but not exclusively) seems to be provoked by any pressure on the healing area.....my regular Doctor suggests it may be due to irritation to nerve fibres during the surgery and to wait another month or so for it to settle, is this good advice/a common occurrence?