• Consumer Health: Are you allergic to shellfish?

a close-up of a plate of shrimp and mixed greensShellfish allergy
Shellfish allergy is an abnormal response by the body's immune system to proteins in certain marine animals, including shrimp, crab, oysters, lobster, squid and scallops. Some people with shellfish allergy react to all shellfish. Others react to only certain kinds. Reactions range from mild symptoms, such as hives or a stuffy nose, to a severe, potentially life-threatening reaction known as anaphylaxis. An anaphylactic reaction to shellfish or anything else is a medical emergency that requires treatment with an epinephrine (adrenaline) injection and a trip to the emergency department. Learn more about the symptoms of shellfish allergy and how to recognize an anaphylactic reaction requiring emergency care.


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Breastfeeding beyond infancy
Breastfeeding beyond infancy benefits mother and baby. How long you breastfeed is up to you and your baby. Worldwide, babies are weaned on average between ages 2 and 4. In some cultures, breastfeeding continues until children are ages 6 or 7. In other parts of the world, this is less common and sometimes can provoke uninformed, negative reactions. Here's what you need to know about the benefits of breastfeeding beyond infancy.

Video: 'Biceps curl with weight machine'
The biceps curl is an exercise that works the muscle in the front of the upper arm. For best results, keep your wrists straight and rigid during the exercise, and keep your movements smooth and controlled. Watch this short video for a demonstration of biceps curls with a weight machine.

Pain and depression: Is there a link?
Pain and depression are closely related. Depression can cause pain, and pain can cause depression. In some people, depression causes unexplained physical symptoms, such as back pain or headaches. This kind of pain may be the first or the only sign of depression. Learn more from Dr. Daniel Hall-Flavin, a Mayo Clinic psychiatrist.

High-protein diets and weight loss
For most healthy people, a high-protein diet isn't harmful, particularly when followed for a short time. Such diets may help with weight loss by making you feel fuller. However, health problems may result if a high-protein diet is followed for an extended time. Learn more from Katherine Zeratsky, a Mayo Clinic registered dietitian nutritionist.

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