Chafing on the inside of the thighs
Short answer: Chafing happens when skin rubs against skin in heat and moisture. A smooth layer in between stops it, which is why shorts worn under a dress and longer leg lengths work.
Skin against skin
It is the combination of friction and moisture that causes chafing. When the skin on the inner thighs rubs together again and again, it becomes red and sore, and sweat makes it worse. Remove one of the two factors and the problem usually disappears or becomes much smaller.
Shorts under a dress
A thin layer between the thighs is the most common solution under dresses and skirts. Under shorts lie smoothly against the skin, so the thighs glide against fabric rather than each other. They add almost no bulk and cannot be seen under a dress of normal length. See bamboo under shorts.
Longer legs for men
For men, boxer shorts with longer legs solve the same problem. Short underpants can ride up, but a pair with longer legs stays in place and keeps the skin apart all day. That applies at work, on the bike and on long walks. See bamboo underpants for men.
The material
A fabric that moves moisture away from the skin reduces friction, because dry skin glides more easily than damp skin. A smooth, soft fabric without coarse seams on the inner leg also makes a difference. Notice where the seams sit when you try a new pair. See bamboo underwear for women.
Length is key
The legs need to reach past the point where the thighs touch. If they are too short, the layer rolls up and forms an edge that can make chafing worse. Check how far down your thighs touch and choose a length that goes a little beyond that.
The fit
The layer should sit close without squeezing. Too loose and it rides up, too tight and the waistband or leg opening can dig in. Use the size table and choose by your measurements rather than habit. A pair that fits properly is something you barely notice during the day.
In summer
The problem is worst in the heat and on long walks, when both sweat and movement increase. Pack an extra pair of under shorts or underpants for your holiday, so you can change at midday if they get damp. Find more advice in bamboo clothing for the summer holiday.
Change when it gets wet
A layer that has become wet with sweat loses some of its effect, because moisture increases friction. If you have a long day ahead or it is very hot, a dry pair in your bag can make a big difference. It takes up little space and only a moment to change.
If the skin is broken
If the skin has already broken, let it rest and get advice from a pharmacy or your doctor before carrying on. Clothing can help prevent it happening again, but it is not a treatment for sores. Keep the skin clean and dry while it heals.
Prevent rather than repair
It is easier to prevent chafing than to let the skin heal afterwards. On days you know will be hot or long, put on under shorts or underpants with longer legs from the morning. That way you do not have to feel it once it is too late.
Frequently asked questions
What stops chafing between the thighs?
A smooth layer in between, usually shorts under a dress or underpants with longer legs. The layer keeps the skin apart, so it glides against fabric rather than itself.
How long should the legs be?
Long enough to reach past the point where the thighs touch. If they are too short, they roll up and form an edge that can make chafing worse.
What should I do if the skin is already broken?
Let the skin rest, keep it clean and dry, and get advice from a pharmacy or your doctor. Clothing helps prevent chafing, but it is not a treatment for sores.
You can find the full range at Bamboo-Clothing.com.
