T63.614

Clinical Causes: Accidental contact with Portuguese Man-o-War while swimming, diving, or wading in beaches where it is present Handling or attempting to remove stranded Portuguese Man-o-War from coastal areas Swimmers inadvertently brushing against tentacles that may be submerged or washed ashore Presence of Portuguese Man-o-War in water due to seasonal or geographic factors, increasing risk of contact

Key Symptoms: Immediate skin pain and burning sensation at the site of contact Redness, swelling, and welts around the sting area Itching or a rash developing shortly after contact Blistering or skin ulceration in severe cases Systemic symptoms such as nausea, vomiting, headache, or dizziness in more serious envenomations Muscle cramps or abdominal pain in some cases

Diagnosis Path: Diagnosis primarily relies on recent history of marine exposure and characteristic skin reactions. Medical professionals may examine the affected area for evidence of tentacle remnants and assess the severity of the symptoms. There are no specific laboratory tests for Portuguese Man-o-War stings; however, in severe cases, blood tests or skin biopsies may be utilized to evaluate the extent of tissue damage or allergic reactions. Proper identification of the marine creature involved can sometimes be aided by photographs taken by the patient or eyewitnesses.

Treatment Protocols: Management of contact with the Portuguese Man-o-War involves immediate first aid measures, which include carefully removing any tentacle fragments without rubbing the area, and rinsing the skin with seawater or vinegar to inactivate remaining nematocysts. Applying hot water (around 45°C or 113°F) to the area can help alleviate pain, as heat neutralizes the venom’s effects. Over-the-counter pain relievers, antihistamines, or topical corticosteroids may be recommended to reduce pain, itching, and inflammation. In severe cases, especially with systemic symptoms, prompt medical attention is essential, and treatment may include supportive care, anesthesia for blistering, or even antivenom in rare instances. Preventative measures include wearing protective clothing when swimming in jellyfish-prone waters and avoiding deliberate contact with marine animals.