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
Multimedia: Slideshows, Images & Quizzes
Picture of Portuguese Man of War Sting
A Portuguese man of war is a type of jellyfish that has tentacles extending from its base that can be up to 165 feet long. Those...
Picture of Allergic Contact Dermatitis
Allergic contact dermatitis. Exposure to the oily sap (urushiol) of poison ivy, poison oak, and poison sumac can result in...
Picture of Jellyfish Envenomation
Jellyfish envenomation. Jellyfish have stingers that are capable of piercing the skin and leaving a toxic venom that result in...
Allergies Quiz: Symptoms & Home Remedies
What are the causes of allergies? This online quiz challenges your knowledge of common food and household allergens,...
Common Allergies: Symptoms and Signs
What are allergies? Pollen, food, perfumes, and many more things can provoke allergy symptoms. Allergies are an overreaction 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
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.
Hives, also called urticaria, is a raised, itchy area of skin. Most often the cause of hives is unknown. Sometimes it is a sign of an allergic reaction to food or medications, but the cause of the allergy (the allergen) is unknown. Dermatographism and swelling (angioedema) may accompany hives. Treatment to get rid of hives and alleviate symptoms typically includes antihistamines.
What Are the 4 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.
Cuts, Scrapes, and Puncture Wounds
Learn about first aid for cuts, scrapes (abrasions), and puncture wounds, when to see a doctor, if tetanus shots are necessary, and how to spot signs of infection.
How Do You Get Rid of Hives Fast?
Learn what medical treatments can help ease your hives and speed up your recovery.
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.
Are Hives and Rash the Same Thing?
Learn how to tell the difference between a rash and hives and how to treat both.
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.
What Is Allergic Cascade?
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.
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.