Blisters form when friction separates the outer layer of skin from the layer beneath. In golf, this friction comes from the club grip moving against your hands during the swing — especially at impact when forces peak.
Several factors determine whether you'll develop blisters: how tightly you grip, moisture levels on your hands, the condition of your grips, and how much you're playing relative to what your hands are conditioned for.
The Grip Pressure Problem
Gripping too tightly is the most common cause of golf blisters. When you death-grip the club, you create more friction between hands and grip. The irony is that excessive grip pressure also reduces clubhead speed and causes tension throughout the swing. Lighter grip pressure is better for both your hands and your game.
Moisture Makes It Worse
Wet skin blisters more easily than dry skin. Sweaty palms, humid conditions, or playing in rain all increase blister risk. The moisture softens skin and changes how it interacts with the grip surface, increasing friction.
Range sessions cause more blisters than rounds because you're hitting many more shots in a compressed time. Your hands don't get recovery breaks between swings like they do when you're walking, waiting, and putting.
Conditioning Matters
Hands adapt to the demands placed on them. A golfer who plays twice weekly develops calluses in the right places. But play four rounds in a weekend and those same hands may blister — the skin wasn't conditioned for that volume.