Florida summers are known for their sunshine, beaches, and outdoor adventures, but they also bring a surge in skin complaints. From mysterious rashes after a dip in the pool to relentless mosquito bites, summertime in the Sunshine State can be tough on your skin.
At Siperstein Dermatology Group, we see a variety of heat- and humidity-related skin conditions this time of year. Here’s a guide to some of the most common summer dermatoses in South Florida, how to recognize them, and what you can do to prevent or treat them.
- Sea Bather’s Eruption (“Sea Lice”)
What it is:
A red, itchy rash caused by tiny jellyfish or sea anemone larvae (most commonly the thimble jellyfish) becoming trapped under swimwear and releasing toxins into the skin.
When it happens:
Spring and summer along Florida’s Atlantic coast after ocean swimming.
What it looks like:
- Itchy red bumps or welts, especially under swimsuits, in armpits, groin, or waistline
- Rash typically appears a few hours after swimming
- Can resemble bug bites or hives
Prevention tips:
- Avoid ocean swimming during jellyfish bloom advisories (commonly Mother’s Day to Father’s Day)
- Remove and rinse swimwear right after exiting the water
- Shower thoroughly after swimming
- Avoid re-wearing unwashed swimsuits
Treatment options:
- Topical steroids and antihistamines for itching
- Cool compresses and calamine lotion can help
- Most rashes resolve within a few days
- Hot Tub Folliculitis
What it is:
A bacterial infection (commonly Pseudomonas aeruginosa) of hair follicles, usually contracted from hot tubs, heated pools, or spas that are not properly chlorinated.
When it happens:
Within 12–48 hours after soaking in a contaminated hot tub or spa.
What it looks like:
- Red, tender bumps or pustules
- Often appears in areas covered by swimsuits
- May be itchy or painful
Prevention tips:
- Avoid hot tubs or spas with unclear water or strong chemical smells
- Shower immediately after using any shared or public water facilities
- Don’t sit in wet swimwear for extended periods
Treatment options:
- Mild cases often resolve on their own
- Topical or oral antibiotics may be needed for more extensive or persistent cases
- Avoid further irritation by keeping the area dry and clean
- Heat Rash (Miliaria Rubra)
What it is:
Also known as “prickly heat,” this rash is caused by blocked sweat ducts trapping sweat under the skin, common in hot, humid Florida weather.
When it happens:
During periods of heavy sweating, especially with tight clothing or in skin folds.
What it looks like:
- Small red bumps or clear blisters
- Often itchy or prickly
- Most common on the chest, back, neck, under breasts, or thighs
Prevention tips:
- Wear loose, breathable fabrics (like cotton or moisture-wicking material)
- Stay in air-conditioned environments when possible
- Shower and dry off thoroughly after sweating
Treatment options:
- Cool compresses and calamine lotion
- Mild topical steroids for itching
- Keep skin cool and dry to promote healing
- Mosquito Bites & Reactions
What it is:
A local allergic reaction to mosquito saliva after a bite.
When it happens:
All summer long, especially at dawn and dusk or near standing water.
What it looks like:
- Itchy red welts, often with a central puncture mark
- Some people may develop larger, hive-like reactions
- Scratching can lead to infection or scarring
Prevention tips:
- Use insect repellent with DEET, picaridin, or oil of lemon eucalyptus
- Wear long sleeves and pants when outdoors, especially in the evening
- Eliminate standing water near your home
Treatment options:
- Topical hydrocortisone or antihistamine creams
- Oral antihistamines like Benadryl or Claritin
- Clean bites with soap and water to prevent infection
When to Seek Dermatologic Care
Most summer rashes are mild and go away with proper care, but sometimes they persist, spread, or get infected. You should see a dermatologist if:
- The rash lasts more than a few days
- You notice signs of infection (pus, warmth, swelling)
- You’re experiencing severe itching or discomfort
- You’re unsure what’s causing your skin irritation
Protect Your Skin This Summer
At Siperstein Dermatology Group, our expert providers are here to help you enjoy Florida’s summer while keeping your skin healthy and rash-free. If you’re dealing with an itchy, painful, or unexplained skin condition, don’t wait, schedule an appointment today at one of our convenient locations.
