If you know you'll be exercising and perspiring, make sure to apply talc-free and alum powders to the areas that usually get the sweatiest. Wet skin will make chafing worse, so get out of wet clothes as soon as you're done exercising. Clothes that are too tight fitting can irritate your skin and cause chafing. Wear synthetic clothes that fit snugly. Clothing that sits close to your skin will prevent the friction that causes chafing. If you're exercising, don't wear cotton and try to dress as minimally as possible. Make sure you don't wear clothes that have seams or straps that rub. If you notice rubbing or irritation when you first put it on, the rubbing will only get worse after several hours of wearing it. Better to choose something more comfortable that doesn't chafe your skin. This is especially true if you're exercising. Drinking lots of water will let your body sweat easier, which prevents salt crystals from forming. Salt crystals on your skin can be a source of friction, causing chafing. You'll need A & D ointment, which is usually used for diaper rash, and petroleum jelly. Combine 1 cup of each in a bowl. Add 1/4 cup of vitamin E cream and 1/4 cup aloe vera cream. Stir the mixture well. It will be pretty stiff, but you can spread it on chafed skin. Spread the lubricant on areas that usually chafe before you plan on exercising or sweating. It can also help heal chafed skin and prevent blisters. If you're overweight, you may notice more chafing. This is especially true if you notice chafing on your thighs. Losing some of the weight will help prevent excess skin from rubbing together in the future. Start by exercising and incorporating healthy food into your diet. You can do an exercise that doesn't cause significant chafing, like swimming weightlifting, or rowing.

How would you rephrase that briefly using Vietnamese?
Giữ da khô. Mặc quần áo phù hợp. Uống nhiều nước. Tự chế kem bôi trơn. Giảm cân.