Staying Healthy at the Jersey Shore: A Philly Doctor's Summer Guide

A patient called from Stone Harbor last August. Her 7-year-old had been throwing up since the second night, and the family was 90 miles from their usual pediatrician. We sorted it out by text in 20 minutes (mild norovirus-pattern stomach bug, oral rehydration plan, anti-nausea pill called in to the local Acme), they avoided an urgent care visit, and the kid was back to playing the next morning. This article walks through the same shore-trip framework I use with patients heading down.

Heat and Hydration at the Shore

Heat illness is the most common shore-trip medical issue and the most preventable. It happens on a spectrum: heat cramps, heat exhaustion, then heat stroke (the medical emergency). Knowing where on the spectrum you sit changes the response. The CDC framework:

• Heat cramps: painful muscle spasms in the legs, abdomen, or arms during or after activity in the heat. The body has lost a lot of salt through sweat. Treatment is shade, fluid with electrolytes, and rest.
• Heat exhaustion: heavy sweating, headache, dizziness, nausea, fast heart rate, weakness, cool clammy skin. The body is losing the fight against the heat but can still cool itself. Treatment is shade, fluids, removing extra clothing, cool cloth, and rest. Most heat exhaustion clears in 30 to 60 minutes if treated.
• Heat stroke: body temperature 103°F or higher, confusion or altered mental status, hot dry skin (sweating may stop), fast strong pulse, seizures. This is a 911 call. Body temperature can rise to 106°F or higher within 10 to 15 minutes once heat stroke begins. Move to shade, cool with cold water or ice (especially on neck, armpits, groin), and get emergency care.

The hydration target for typical shore activity:

• About 1 cup of water every 15 to 20 minutes during heat exposure or physical activity, per NIOSH for occupational heat exposure.
• Electrolytes matter once sweat losses are significant. For a day at the beach, add a sodium-and-potassium electrolyte source: Liquid IV, LMNT, DripDrop, Pedialyte, or a salty snack with water. Plain water alone over many hours can dilute serum sodium.
• Pre-hydration: start hydrated the morning before. Trying to catch up at 3 PM in 92°F sun is much harder than starting at 8 AM with breakfast.
• Cool the gut: an iced electrolyte drink absorbs faster and helps body temperature.

Special groups to watch closely: kids under 5, adults over 65, anyone on diuretics or blood pressure medications, and anyone with diabetes or kidney disease.

Sun Protection

Sunburn is not just a cosmetic issue. It is a measurable raise in lifetime skin cancer risk, especially in childhood. The CDC recommendation and the supporting dermatology consensus:

• Broad-spectrum SPF 30 or higher. Broad-spectrum means protection against both UVA (penetrates deeper, drives photoaging and some cancer pathways) and UVB (the burning ray).
• Apply 15 minutes before going outside. Sunscreen needs time to bind to skin.
• Reapply every 2 hours, and after swimming, sweating heavily, or toweling off.
• Use enough. Adult full-body application is about 1 ounce (a shot glass). Most people use a third of that.
• Mineral (zinc oxide, titanium dioxide) or chemical formulations both work. Mineral is the default for sensitive skin, infants over 6 months, and the face. Chemical is often cosmetically cleaner. Pick what you will actually use.
• "Reef-safe" typically means avoiding oxybenzone and octinoxate. The science on coral impact is real; if you are paddling, snorkeling, or in protected waters, lean reef-safe.

Other layers that beat sunscreen for primary protection:

• UPF clothing (long-sleeve sun shirts, rash guards) for kids and adults during peak hours.
• Wide-brim hats that shade ears and the back of the neck.
• Beach umbrellas and shade during the 10 AM to 4 PM peak.
• Sunglasses with UV400. UV damage to the eye is real and cumulative.

A severe sunburn (large blistering area, fever, chills, confusion) is not just a worse sunburn; it is a sun-induced injury that may need clinical management. Same-day call or text.

Ocean and Sand Hazards

Most Jersey shore "water" issues fall into a small number of categories. Jellyfish stings. The most common stinger on the New Jersey coast is the lion's mane jellyfish and seasonal sea nettle. For an uncomplicated sting:

1. Rinse with sea water, not fresh water. Fresh water can trigger remaining nematocysts to fire.
2. Pluck visible tentacles with the edge of a credit card or tweezers (not bare fingers).
3. Soak in hot water (around 110 to 113°F, as hot as tolerable without burning) for 20 to 45 minutes. Heat denatures the venom. Vinegar is the right move for box jellyfish in tropical waters, not for typical NJ stings.
4. Topical hydrocortisone and oral antihistamine for itch and inflammation.
5. Call for help if the sting covers a large area, involves face or eyes, or if there is wheezing, throat tightness, or full-body rash (anaphylaxis).

Swimmer's ear (otitis externa). Saltwater plus warm humid air is the classic recipe. Symptoms are ear pain, fullness, drainage, and pain on pulling the outer ear. The fix is usually prescription antibiotic ear drops (ofloxacin or ciprofloxacin) and keeping the ear dry. Over-the-counter Swim-Ear drops (95% isopropyl alcohol + glycerin) used after swimming can prevent recurrences. Surf cuts and shell injuries. Cuts on the foot or shin from shells, broken bottles, or rocks are common. Rinse well with clean water, apply pressure to stop bleeding, and cover with a clean bandage. Tetanus status matters; if your last shot was more than 10 years ago, plan to update it after you get home. See the Cut at Home guide for the 3-question triage if a cut looks deeper than expected. Rip currents. Drowning is the worst-case scenario at the shore. The NOAA guidance is clear: never swim against a rip current. Swim parallel to the shore until you are out of the current, then swim diagonally back to the beach. Swim where lifeguards are present and on duty. Most New Jersey beaches have lifeguards from about 10 AM to 5 PM Memorial Day through Labor Day; off-hours and shoulder-season swimming is meaningfully more dangerous. Stingrays and crabs. Less common. Shuffle your feet when wading in shallow water to give stingrays a chance to move. Crab pinches are usually minor; wash and bandage.

Food, Boardwalk, and Stomach Bugs

A common reason for a shore-trip clinic call is sudden GI illness in 1 or more family members. Two patterns:

• Foodborne (food poisoning) typically hits 2 to 12 hours after a suspect meal, often with intense early vomiting, then diarrhea, and resolves within 12 to 24 hours. Common culprits: undercooked shellfish, mayonnaise-based salads that sat out, and shared platters at large gatherings.
• Viral gastroenteritis (norovirus, "stomach bug") builds over a day, comes with body aches and low fever, and lasts 24 to 72 hours. Highly contagious among households and tight social groups (think shore houses with multiple families).

The home plan for either (detailed in the Nausea Clinical Guide):

1. Small frequent sips of an oral rehydration solution. 1 to 2 teaspoons every 5 to 10 minutes for the first hour.
2. Rest the stomach for at least 6 hours after the last vomiting episode before solid food.
3. BRAT diet (bananas, rice, applesauce, toast) for the first 24 hours of recovery.
4. Watch for dehydration signs: no urine for 8 hours, dizziness on standing, dry mouth, sunken eyes, rapid heart rate. Any of these in a child or older adult is a call to a clinician.

When to call (or text Fishtown Medicine for triage):

• No fluids in for 8 hours.
• Blood in vomit or stool.
• Severe abdominal pain or rock-hard belly.
• Fever over 101°F with vomiting.
• Confusion, severe weakness, or fainting on standing.

Ticks, Mosquitoes, and Outdoor Exposures

The Jersey shore is also a tick environment, especially in the wooded and marshy areas inland from the beach. Two pathogens to know:

• Lyme disease is endemic in southern New Jersey. Transmitted by the deer tick (black-legged tick). Removing an attached tick within 24 hours of bite dramatically reduces the risk. A bullseye rash 3 to 30 days after a tick bite, with or without fevers and aches, is the classic early sign and needs antibiotics same week.
• Babesiosis and anaplasmosis are less common but exist in NJ and can cause severe disease.

Practical tick prevention:

1. DEET 20 to 30% or picaridin 20% on exposed skin for adults and children over 2 months.
2. Permethrin-treated clothing (gaiters, socks, pants) for hikes and yard work.
3. Tick checks after every outdoor session. Focus on the scalp hairline, behind ears, armpits, waistband, groin, behind knees.
4. Shower within 2 hours of coming inside.
5. Save the tick in a sealed bag if you find one attached. Photo and date it. Mail-in identification services exist.

Mosquito-borne illness in southern NJ is mostly a nuisance; rare West Nile virus cases occur. The same DEET or picaridin protection applies.

Guidance from the Clinic

What to Pack: A Shore-House Health Kit

A small bin in the car covers 95% of what comes up:

1. Sunscreen (SPF 30+ broad spectrum), enough for the whole household for the week. Backup tube for the car.
2. Aloe vera gel for sunburn.
3. Electrolyte packets (Liquid IV, LMNT, DripDrop, or Pedialyte powder). 1 per day per adult, more on big sun days.
4. Oral rehydration solution ready-made (Pedialyte) for kids.
5. Anti-nausea: Dramamine for motion sickness; prescription Zofran on hand if a member is prone to GI illness.
6. Loperamide (Imodium) for adults with diarrhea (avoid in children under 6 unless directed).
7. Diphenhydramine (Benadryl) for stings and rashes. Cetirizine for non-drowsy itch control.
8. Hydrocortisone 1% cream for stings, rashes, plant exposure.
9. Topical antibiotic like plain petrolatum (Vaseline or Aquaphor) and adhesive bandages. See the Cut at Home guide for the case against routine Neosporin.
10. Acetaminophen and ibuprofen for fever and pain.
11. Saline ear drops or Swim-Ear for swimmer's ear prevention.
12. DEET or picaridin insect repellent.
13. Tweezers and a small first-aid kit with gauze, tape, and clean bandages.
14. Thermometer.
15. A list of family medications, allergies, and your physician's contact info in case a local clinician needs it.

For Fishtown Medicine members, Dr. Ash's cell number replaces step 15.

Special Groups to Plan For

Kids under 5. Higher dehydration risk, higher sunburn risk, harder to assess. Lower threshold to call for vomiting, fever over 102°F, or any change in behavior. Adults over 65 and patients on diuretics. Lower thirst sensation, higher heat illness risk. Pre-hydrate, take cool breaks, and watch for confusion as the first sign of heat stroke (rather than waiting for a clear collapse). Pregnant patients. Higher core body temperature already. More careful with heat exposure, especially first trimester. DEET is safe at typical concentrations in pregnancy. People on blood pressure or diabetes medications. Heat-induced vasodilation can drop blood pressure too far. Some diabetes medications (SGLT-2 inhibitors, GLP-1s) raise dehydration risk. Plan extra fluids and consider holding a diuretic dose on the highest-heat days, with your physician's approval. Patients with skin conditions (psoriasis, eczema, rosacea, vitiligo, melasma). Sun can help or hurt depending on the condition. Get a personalized plan before the trip.

How Fishtown Medicine Handles Shore Trips

At Fishtown Medicine, the shore-trip protocol is the same as the at-home protocol: a text gets a triage answer within minutes during waking hours. The flow:

1. Pre-trip text if anyone in the family has a medical question. Confirms medication list and refills. Reviews any recent issues.
2. In-trip text triage. Photo of the sting, the cut, the rash. Description of the timeline. Response usually inside 20 minutes.
3. Prescription if needed called in to a local Acme, CVS, or Wawa pharmacy.
4. Coordination with a local urgent care or ED if escalation is required.
5. Follow-up the next day to make sure things resolved.

This is the kind of issue continuous-care DPC was built for. The infrastructure for routine same-day texting from out of town does not exist in most insurance-based primary care.

The Bottom Line

The Jersey shore is one of the best parts of being a Philly family in summer. Most of what goes wrong on a shore trip is predictable and preventable. Pre-hydrate, use enough sunscreen and reapply it, pack a small kit, and know the few red flags that actually need same-day care: heat stroke (confusion, body temp 103°F or higher, hot dry skin), severe allergic reactions (throat tightness, breathing trouble), uncontrolled bleeding, severe dehydration, and any sudden neurologic change. Everything else triages from the porch.

Key Takeaways

• Hydrate before you feel thirsty. About 1 cup of water every 15 to 20 minutes during heat exposure, plus an electrolyte source.
• Broad-spectrum SPF 30 or higher, applied 15 minutes before sun and reapplied every 2 hours and after swimming.
• Know the heat-illness spectrum: cramps, exhaustion, stroke. Heat stroke (confusion, hot dry skin, temp 103°F+) is a 911 call.
• Most ocean stings respond to hot water immersion (110 to 113°F) and antihistamines.
• Tick checks daily. Lyme is real in southern NJ; remove attached ticks within 24 hours.

Scientific References and Sources

1. Centers for Disease Control and Prevention. "Heat-related Illnesses (NIOSH)." Accessed 2026.
2. Centers for Disease Control and Prevention. "Sun Safety Facts." Skin Cancer Prevention, accessed 2026.
3. Centers for Disease Control and Prevention. "Reducing Risk for Skin Cancer." Accessed 2026.
4. NIOSH. "Keeping Workers Hydrated and Cool Despite the Heat." Hydration recommendations for occupational heat exposure.
5. National Weather Service. "Rip Current Safety." Drowning prevention guidance.
6. American Academy of Dermatology. "Sunscreen FAQs." Application and SPF guidance.

Medical Disclaimer: This article provides general clinical context for a healthy adult planning a summer shore trip. It is not a substitute for individual medical advice. Patients with chronic medical conditions, pregnant patients, young children, and older adults should discuss heat, sun, and travel-specific concerns with a clinician before the trip.

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Dr. Ash is a board-certified internal medicine physician at Fishtown Medicine in Philadelphia. Practice members get direct text access for shore-trip triage; non-members can book a free Warm Invitation Call before the season starts.