How to Avoid Wetsuit Rash and Chafing

Wetsuit rash is the cumulative damage from neoprene rubbing against skin for hours, amplified by salt water, sand, and bacterial buildup. Avoiding wetsuit rash and chafing requires a combination of layering, anti-chafe products, and suit hygiene. This guide covers the common rash zones, the prevention techniques that actually work, and what to do when rash starts so it doesn’t keep you out of the water for a week.

For broader gear care, see our wetsuit care and maintenance guide and wetsuit shampoo buying guide.

Why wetsuits cause rash

Three contributing factors:

1. Friction. Wetsuit neoprene rubs against skin with every body movement. In a 90-minute session, the chest, neck, underarms, and inner thighs see thousands of friction cycles. Even smooth nylon-jersey lining causes mechanical wear on skin over time.

2. Salt-water and sand abrasion. Salt is mildly abrasive when wet. Sand at the suit-skin interface is sharply abrasive. The combination is grit-paper against skin for hours.

3. Bacterial buildup. Old sweat, urine, and bacterial film inside a poorly-cleaned wetsuit chemically irritate skin. The chemical irritation combines with friction damage and amplifies inflammation.

The cumulative effect: rash starts as red irritated patches, can progress to broken skin, and can take weeks to fully heal if it gets out of hand.

The most common rash zones

Neck

The number-one rash zone. The neck collar of any wetsuit moves constantly during paddling and head-up positions. The thin skin of the neck is more prone to friction damage than thicker body skin. Signs: red ring around the neckline, sometimes broken skin where the collar meets the chest.

Prevention: Wear a long-sleeve UPF 50 rash guard under the wetsuit. The rash guard’s fabric collar slides against the neoprene rather than your skin sliding against the neoprene. This single change eliminates 80 percent of neck rash for most surfers.

For chronic neck rash that persists even with a rash guard, apply Body Glide or similar friction-reducing balm to the neck before each session. Wash the wetsuit’s neck collar regularly with wetsuit shampoo.

Underarms

The underarm area sees high friction during paddling. Direct skin-on-neoprene contact under a wet rubber armhole creates rash. Signs: red irritated skin at the armpit, sometimes broken skin in the deepest crease.

Prevention: Long-sleeve rash guard underneath. The sleeve covers the underarm and breaks direct friction. For users without rash guards, Body Glide or anti-chafe balm to the underarm pre-session.

Lower back

Surfers and SUP riders develop lower-back rash from the wetsuit moving against the lumbar area during paddling and pop-ups. Signs: irritated horizontal stripe across the lower back where the suit’s waistline sits.

Prevention: Rash guard tucked into wetsuit. Anti-chafe balm at the waistline.

Inner thighs

Inner-thigh chafing from suit-on-skin friction is common in long sessions. Signs: red irritated skin at the inner thigh, sometimes spreading to the groin.

Prevention: Compression shorts or dive-style shorts under the wetsuit. Body Glide or chamois cream (cycling-industry product, works for surf chafing) applied liberally to the inner thigh pre-session.

Less common but real: armpit hair against velcro

For surfers with chest-zip or front-zip suits, the velcro neck flap can catch armpit hair during donning and create localized irritation. Trimming or shaving isn’t needed, but applying a small amount of balm to the velcro contact zone before donning prevents this.

The layering solution

The single best rash prevention is wearing a thin rash guard underneath your wetsuit. The rash guard:

• Breaks direct skin-on-neoprene contact
• Wicks moisture away from skin
• Adds light warmth as a side benefit
• Provides UPF protection if you ever surf without the wetsuit

For most surfers, a long-sleeve UPF 50 rash guard underneath any wetsuit eliminates 80 to 90 percent of rash issues. Worth the $25 to $40 investment.

Brands and picks covered in our rash guard buying guide.

Anti-chafe balms and creams

For zones where layering doesn’t help (neck, underarms in sleeveless suits, inner thighs), anti-chafe balm is the next line of defense. Standard products:

Body Glide: Stick form, dries clear, water-resistant for hours. Standard in marathon-running and surf-fitness communities. Apply liberally to neck, underarms, and inner thighs pre-session.

Vaseline (petroleum jelly): Cheap, effective, slightly less water-resistant than Body Glide. Older surfers’ standby. Works similarly to Body Glide at a fraction of the cost.

Sport Slick: Cycling-industry chamois cream, works for any sport-related chafing. Slightly thicker consistency than Body Glide.

Aquaphor: Healing balm rather than chafe-prevention specifically. Best used on existing rash to promote healing. Some surfers use it pre-session as a barrier; works but feels heavier than Body Glide.

For most surfers, Body Glide or Vaseline before sessions is enough. Reapply mid-day if you’re doing back-to-back sessions.

Suit hygiene to reduce bacterial irritation

Bacterial buildup inside a wetsuit contributes to skin inflammation and amplifies any friction-rash. Regular cleaning helps:

• Rinse with fresh water after every session. Quick hose-down at the beach or at home.
• Periodic shampoo with wetsuit shampoo every 5 to 10 sessions.
• Hang inside-out on a proper hanger until lining is dry, then flip and dry the outside.
• Avoid storing damp in a closed bag or trunk; bacteria multiply rapidly in warm wet conditions.

For deeper care guidance, see wetsuit care and maintenance.

When rash starts: triage

Three steps when you notice rash forming:

1. Identify the zone. Where exactly is it? Neck, underarms, lower back, or inner thighs?

2. Stop using that zone unprotected. Layer a rash guard, apply Body Glide, switch to a different suit if you have one.

3. Treat early. Wash the area with soap and water; apply unscented Aquaphor or similar healing balm; cover with non-stick bandage if open. Over-the-counter hydrocortisone (1 percent) for itchiness.

Most simple rash heals in 3 to 5 days with proper care. Don’t push back into surfing in the same suit until the rash is fully healed; you’ll just re-injure the same zone.

Special cases

Cold water and rash

Cold-water surfers in the PNW, Maine, and similar regions sometimes report less rash than warm-water surfers despite longer sessions. The reason: cold-water suits typically include thermal linings that are softer against skin than basic nylon jersey. The plush interior reduces friction at the trunk where most rash starts.

For thermal-lined suit options, see our thermal linings compared guide.

Open-cell spearfishing suits

Open-cell rubber against skin causes intense rash if rubbed dry. The standard practice (using soapy water lubricant for donning) prevents the rash by maintaining a wet skin-rubber interface. The spearfishing wetsuits guide covers the technique.

New wetsuit break-in

A brand-new wetsuit can cause more rash in its first 5 to 10 sessions because the rubber and lining haven’t softened yet. Use anti-chafe balm religiously during the break-in period. After 10 sessions, the rash incidence drops as the suit conforms to your body.

Triathlon-specific rash

Triathletes face shoulder rash during long open-water swim training. The constant repetitive shoulder motion creates rash that doesn’t appear in typical surf use. Triathlon-specific balms (Trislide is a common pick) and aggressive Body Glide application before swims address this. For triathlon-specific gear, see best wetsuits for triathlons and the Zone3 brand guide.

Long-term skin care

For surfers who put in serious water time, rash protection should be part of the daily kit, not an afterthought. The standard cold-water surfer’s kit includes:

• A long-sleeve rash guard
• A stick of Body Glide or Vaseline
• Wetsuit shampoo for periodic cleaning
• A clean towel for post-session drying

For broader gear context: wetsuit care and maintenance, wetsuit shampoo buying guide, rash guard buying guide, hanger and storage guide, wetsuit longevity study, thermal linings compared, how should a wetsuit fit (a too-tight suit causes more rash than a properly-fitted one). For thickness selection, the Wetsuit Finder tool takes 60 seconds.

Sources cited

• American Academy of Dermatology. Skin care and friction-rash resources. Medical guidance on friction rash treatment.
• Body Glide. Body Glide product information. Manufacturer info on the standard anti-chafe balm.
• Surfer Today. Wetsuit Rash. Industry-blog overview of common surfer rash issues.