Jellyfish are the most common creatures found in seawater around the world. Jellyfish tentacles have stinging cells called nematocysts that secrete a poisonous substance (venom). The best treatment for jellyfish stings includes rinsing the area with water or vinegar, removing the tentacles, soaking the affected area in hot water, taking medications to ease itching and pain and seeking medical attention, if necessary. Read more: What Is the Best Treatment for a Jellyfish Sting? Article
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Could I Be Allergic? Discover Your Allergy Triggers
Allergies are an overreaction of the immune system where the body's defenses react to substances such as pollen, food and more....
Allergies Quiz: Symptoms & Home Remedies
What are the causes of allergies? This online quiz challenges your knowledge of common food and household allergens,...
Picture of Allergic Contact Dermatitis
A red, itchy, weepy reaction where the skin has come into contact with a substance that the immune system recognizes as foreign....
Picture of Portuguese Man of War Sting
One of the most painful effects on skin is the consequence of attack by oceanic hydrozoans known as Portuguese men-of-war, which...
Picture of Jellyfish Envenomation
Pruritic and painful papules in a linear arrangement on the leg, appearing after contact with jellyfish. See a picture of...
Dangerous Allergies: Anaphylaxis and Life-Threatening Allergy Triggers
Common allergy triggers may provoke anaphylaxis. Hives, tongue swelling, face swelling, rashes, low blood pressure, rapid and...
Summer Skin Dangers: Burns, Bites, Stings, and More
Summer can be hazardous to your skin if you come in contact with jellyfish, stingrays, henna tattoos, poison ivy, oak, sumac,...
Related Disease Conditions
What Are the Four Types of Allergic Reactions?
Allergists recognize four types of allergic reactions: Type I or anaphylactic reactions, type II or cytotoxic reactions, type III or immunocomplex reactions and type IV or cell-mediated reactions.
Hives, also called urticaria, is a raised, itchy area of skin that is usually a sign of an allergic reaction. The allergy may be to food or medications, but usually the cause of the allergy (the allergen) is unknown.
How Long Does an Allergic Reaction Last?
Allergic reactions may last for varying lengths of time. They may take a few hours to a few days to disappear. If the exposure to the allergen continues, such as during a spring pollen season, allergic reactions may last for longer periods such as a few weeks to months.
The allergic cascade refers to allergic reactions that happen in the body in response to allergens. A variety of immune cells and chemical messengers participate in the allergic cascade. Symptoms of the allergic cascade range from mild swelling and itching to full-blown anaphylactic shock. Allergen avoidance and medications are used to prevent or treat allergies.
How to Get Rid of Hives: 20 Ways
Hives or urticarias are red, itchy skin rashes triggered by food, medicine, or other irritants. They can vary from a few millimeters to several centimeters in diameters.
What Are the Main Causes of Urticaria (Hives)?
Hives are mostly an allergic reaction, appearing quickly and disappearing as fast. Learn what causes them, when to see a doctor and how to avoid them.
How Do You Get Rid of Hives Fast?
Learn what medical treatments can help ease your hives and speed up your recovery.
What Is Causing My Hives?
Hives, medically known as urticaria, are common rashes that anyone can get at any point in their lives. They can happen only once in your life, keep happening often, or stay longer (chronic) for more than 6 weeks.
Are Hives and Rash the Same Thing?
Learn how to tell the difference between a rash and hives and how to treat both.