Fish allergies, including tuna, are among the top four causes of food allergies you may experience as an adult. You may develop a food allergy at any time, and your symptoms may range from mild to life threatening, depending on the severity of your allergy and your exposure to the food. According to the Mayo Clinic and the American Academy of Allergy, Asthma and Immunology, tuna allergy symptoms include swelling and anaphylaxis.
A tuna allergy may cause you to have shortness of breath, a runny nose or nasal and sinus congestion after eating tuna and tuna products.
You may develop hives on your face or in your mouth and throat after eating tuna, as well as on your hands and skin if you touched the tuna before you ate it.
Your lips, tongue, mouth and throat may become itchy after eating tuna if you have a tuna allergy, and the itching may begin immediately after you eat the tuna.
Your lips, mouth, face and throat may become swollen after eating tuna if you have a tuna allergy, and this symptom may require medical attention if it lasts for more than a few hours.
You may notice tingling or a prickling sensation in your lips, tongue and mouth a few minutes after eating tuna if you have a tuna allergy.
Anaphylaxis is a condition that you may develop if your allergy to tuna is severe, and signs of it include dizziness, low blood pressure, a weak pulse, vomiting and loss of consciousness.