Marine stings, sunburn, and heat illness

Three things that ruin a good vacation

Key West offers some of the finest weather, water, and outdoor activity in the continental United States. It also offers jellyfish, a sun that operates at an intensity that catches most visitors off guard, and a heat that builds through the afternoon in ways that shade and sunscreen only partially address. Most visitors who end up in a clinic with a marine sting, a sunburn, or heat illness did not expect to be there. The good news is that urgent care handles all three of these concerns well in most presentations. None of them require the emergency room under ordinary circumstances. But a few specific presentations of each cross into emergency territory, and knowing which is which is worth a few minutes of your time before you head out on the water.

Marine stings: jellyfish, Portuguese man-of-war, and sea urchins

Jellyfish are common in Key West waters, particularly in summer months and after storms. Their tentacles leave stinging cells in the skin that cause burning pain and raised welts. Immediate first aid: rinse with seawater rather than fresh water, which can trigger further venom release, and carefully remove visible tentacles using a card or the edge of a shell rather than bare fingers. Hot water immersion (as hot as the person can comfortably tolerate) helps neutralize venom and reduce pain. Portuguese man-of-war stings are similar in mechanism but often more severe and extensive. Sea urchin spines that penetrate the skin need removal. Superficial spines sometimes dissolve on their own, but spines lodged near joints or deeply embedded should be evaluated at a clinic. Most marine stings are handled at urgent care, not the emergency room.

Sunburn: what the Florida sun actually does

The sunburn risk in Key West is significantly higher than most visitors expect, even those who consider themselves experienced outdoors people. The latitude, the reflective water, and the midday heat combine to produce burns that develop faster than they would at home. Mild to moderate sunburn (redness, soreness, warmth without blistering) can usually be managed with cool water, aloe vera gel, and over-the-counter pain relief. Avoid further sun exposure and stay well hydrated. Severe sunburn is different. Extensive blistering, fever, chills, nausea, or confusion alongside your sunburn represents a systemic response. Your body is registering significant distress. Severe sunburn with systemic symptoms warrants urgent care evaluation. A clinic can assess the extent of injury, manage pain, and evaluate for dehydration or early infection.

Heat exhaustion: when the body starts losing the argument

Heat exhaustion happens when the body has been working to cool itself for too long without enough fluids or rest. The symptoms are recognizable: heavy sweating, cool and pale skin, weakness, nausea, headache, and dizziness. The treatment in mild cases is straightforward: move to a cool area, lie down, drink water or a sports drink, loosen clothing. Most people recover with these measures within thirty to forty-five minutes. If symptoms are not improving after thirty minutes of rest and cooling, or if they are worsening, urgent care evaluation is appropriate. Dehydration at a symptomatic level is better assessed in a clinical setting, and IV hydration is available at most urgent care clinics when oral intake is not sufficient.

Emergency

Emergency: heat stroke and severe anaphylaxis

Some presentations are not urgent care concerns. They are emergency room concerns. Call 911 immediately for heat stroke (characterized by hot dry skin or minimal sweating, body temperature above 104 degrees, confusion, or loss of consciousness). Heat stroke is not the same condition as heat exhaustion. It requires emergency cooling and medical management without delay. Also call 911 for any marine sting that produces throat swelling, difficulty breathing, a severe systemic reaction, or loss of consciousness. These signs can indicate anaphylaxis, a life-threatening allergic reaction that requires epinephrine. Do not attempt to drive someone with heat stroke or anaphylaxis to a clinic.

Urgent care handles the rest

For presentations that do not meet emergency criteria, urgent care and walk-in clinics in Key West handle marine stings, sunburn complications, and heat illness well. Advanced Urgent Care of the Florida Keys and Mount Sinai Walk-In Care are two options Key West Healthcare lists for urgent care in Key West. Neither typically requires an appointment. Bring any information you have about the specific exposure: the type of marine creature if you know it, the approximate time and duration of sun exposure, how long symptoms have been present. That information helps the clinician evaluate your situation more efficiently. Call ahead to verify current hours before making the trip.

Frequently asked questions.