From Cape Cod to the North Shore, Massachusetts beaches are the go-to destination for relaxation, water sports, and coastal fun in the summer. But beneath the surface of all that sun and surf lies a hidden risk: waterborne illnesses, red tide exposure, and skin rashes that can seriously affect your health.

The truth is that even clean-looking water can carry unseen threats. Whether it's, a bacterial infection from a small cut or irritation from algae bloom toxins, knowing what to watch out for and what to do if symptoms can save you days of discomfort or worse.

At AFC Urgent Care Massachusetts, we treat a wide range of summer-related conditions. In this guide, we'll break down the most common beach-related health concerns and explain when a trip to urgent care is your best bet. To find a location near your favorite Massachusetts beach, visit AFC Urgent Care Massachusetts.

What Is Red Tide and Why Is It a Concern

Red tide refers to harmful algal blooms (HABs), which are caused by microscopic algae that multiply rapidly in certain environmental conditions. While not all red tides are toxic, some produce neurotoxins and skin irritants that can affect both sea life and humans.

Where Do Red Tides Happen

In Massachusetts, red tide events typically affect coastal areas, including:

• Cape Cod Bay
• Buzzards Bay
• Nantucket Sound
• Parts of the South Shore

The Massachusetts Division of Marine Fisheries monitors these blooms and issues warnings when red tide levels are unsafe.

How Red Tides Affect Humans

You don't have to drink the water to be affected. Swimming or even walking near a red tide can cause:

• Eye, throat, and skin irritation
• Coughing and wheezing from airborne toxins
• Burning or itchy skin if exposed to contaminated water
• Gastrointestinal upset if contaminated shellfish are consumed

If you've been swimming near a red tide and develop any symptoms, wash with fresh water immediately and monitor closely.
Need help identifying whether it's red tide exposure? Visit your local AFC center for fast diagnosis and relief.

Beach Rash: What It Is and How to Spot It

A common and unpleasant side effect of swimming in warm water is "swimmer's itch," a rash caused by parasites called cercariae that live in the droppings of waterfowl. When humans come into contact with contaminated water, the parasites attempt to burrow into the skin, triggering an allergic reaction.

Symptoms of Swimmer's Itch

• Itchy red bumps that resemble mosquito bites
• Tingling or burning sensation while still in the water
• Rash that develops within 24 hours of swimming
• Blistering in severe cases

The rash typically appears on parts of the body that were not protected by swimwear.

How to Treat It

• Use anti-itch creams like hydrocortisone
• Apply cool compresses to reduce inflammation
• Take an antihistamine like Benadryl for relief
• Avoid scratching, which can lead to secondary infection

Most rashes clear up within a few days, but if the reaction worsens or signs of infection appear, it's time to visit AFC Urgent Care Massachusetts.

Waterborne Bacterial Infections: More Than Just a Cut

Whether it's a scraped knee from surfboarding or a small nick from a seashell, any open wound is vulnerable when you swim in natural water. Certain bacteria, especially in warmer or brackish water, can cause infections in broken skin.

Most Common Bacteria Found in Beach Water

• Vibrio vulnificus – Often found in saltwater and can cause severe wound infections
• E. coli – Indicates fecal contamination and can cause gastrointestinal illness
• Enterococcus – Found in both freshwater and saltwater and linked to skin and GI infections

Symptoms of a Waterborne Bacterial Infection

• Redness and swelling around a wound
• Warmth, pain, or pus drainage from the area
• Fever or chills
• Nausea, vomiting, or diarrhea if ingested water was contaminated

If you suspect a bacterial infection from beach water, do not wait it out. These infections can spread quickly and require prompt medical treatment. Walk into your nearest AFC Urgent Care location for same-day care.

Gastrointestinal Illness After a Beach Day

Sometimes, the culprit behind post-beach sickness is not what's on your skin but what's in your stomach. Contaminated beach water or undercooked shellfish can carry bacteria, parasites, or viruses that lead to severe gastrointestinal distress.

Common Causes

• Swallowing contaminated water
• Eating improperly stored seafood
• Poor hygiene at public beach facilities
• Unclean hands when eating post-swim

Symptoms to Watch

• Stomach cramps
• Nausea or vomiting
• Diarrhea
• Fever and chills

Mild symptoms may resolve within 24 hours, but if you're experiencing bloody diarrhea, dehydration, or symptoms that persist for more than a day, don't hesitate to visit AFC Urgent Care Massachusetts for testing and treatment.

How to Protect Yourself Before You Hit the Water

While the risks are real, most beach-related illnesses are preventable. Here are some expert-backed tips:

Check Water Quality Before You Go

• Use the Massachusetts Department of Public Health's Beach Water Quality Monitoring site
• Avoid swimming after heavy rain when runoff is highest
• Obey all red tide or contamination warnings posted at beaches

Rinse Off Immediately After Swimming

Use fresh water showers provided at most public beaches to wash away potential contaminants.

Cover Cuts and Wounds

Waterproof bandages can help reduce the risk of bacteria entering broken skin.

Avoid Eating Raw Shellfish

Only eat seafood from trusted sources and ensure it is thoroughly cooked.

Dry Off Thoroughly

Pay special attention to the ears, toes, and areas under swimsuits where moisture can get trapped.

When to Visit AFC Urgent Care Massachusetts

If you or your child develops symptoms after a beach day that include:

• Persistent or worsening rash
• Skin that is red, hot, or oozing
• Diarrhea or vomiting lasting longer than 24 hours
• Fever following water exposure
• Sudden allergic reactions like hives or swelling

It's time to see a provider. At AFC Urgent Care Massachusetts, we provide fast, walk-in care for:

• Skin infections and irritations
• Dehydration and heat-related illness
• Ear, eye, and throat complaints
• GI symptoms
• Tick and insect bites

No appointment is needed, and most locations are open in the evenings and on weekends. Find a clinic near you here.

Massachusetts beaches are a wonderful escape in the summer, but staying safe means staying informed. From red tides to rashes and bacterial infections, water-related illnesses are more common than you think, but they're also manageable with the proper precautions.

Know the risks, take simple preventive steps, and if something doesn't feel right after your beach visit, trust the team at AFC Urgent Care Massachusetts to get you back on your feet quickly. 👉 Visit AFC Urgent Care Massachusetts today for expert care seven days a week.