First, this area is prone to hold moisture from sweating. Make sure to keep the area clean and pat dry. Vaseline remains one of the best barriers against chaffing and moisture. If the skin is open, you may need an anti-bacterial cream instead.
Not sure it is really the brand that causes the chaffing. I believe it is more of the fabric that is chaffing you. If you are using cotton then you might try underwear that is silk. I honestly believe the fabric is causing the chaffing not the brand.
Depending on your skin and length of spandex, it may result in some chaffing. Longer spandex tends to cause chaffing more than shorter ones. As long as you take necessary precautions, chaffing shouldn't be a big deal.
It protects them from cold and from chaffing.
There are many online stores where you can purchase chafing dishes. Some of the more popular stores include Amazon, Buzz Catering Supplies and Ced Online.
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Desitin
No not all blisters are herpes. Some are just water blisters from chaffing, some types of eczema can also cause blisters.
Friction of the skin can cause chaffing and chapping. The friction can cause bed sores in people that are bedridden, and irritation in people that are active.
Many players wear socks, stockings, or some other cloth layer under their shin guards to prevent chaffing.
Light cream is sweet cream with less butterfat than heavy cream. I think in the UK light cream is called single cream and heavy cream is double or whipping cream.