title: I recently broke out in hives and had bad stomach pains after eating crab legs. I've never had problems before. Is it possible to develop an allergy to shellfish as an adult?
mesh_terms: D000328:Adult; D005512:Food Hypersensitivity / Q000150:complications* / Q000517:prevention & control; D006801:Humans; D012758:Shellfish / Q000009:adverse effects*