Allergy to Cuttlefish? – Middle finger of my right hand has a swollen sore (without visible wound)

This afternoon (2008-07-21), the Middle finger (on the right side) of my right hand had a small swollen sore (without visible wound) probably due my allergy to the small Japanese cuttlefish and some prawn taken in the buffet dinner on 2008-07-21 (Friday). I can feel the pain when pressed lightly.