Regular salt water soaks can promote healing and prevent infection. You may get salt water solution from your piercer or buy a sterile saline spray at your local drugstore. You can also put 1/8 teaspoon (1.34 g) of salt into 8 fluid ounces (240 mL) of water and mix them thoroughly.  Submerge the piercing directly in the mixture or apply the soak with a clean washcloth or paper towel by gently holding it to your piercing for a few minutes at a time. Apply the soak for 5 to 6 minutes. Do this twice a day for about a month or until your piercing is fully healed. Swimming after a piercing is a bad idea. Chlorine from pool water, and contaminants from open water, can irritate a piercing and cause infection. Refrain from swimming until your piercing is fully healed. You should also avoid soaking in bathtubs or hot tubs. Keep foreign objects away from the pierced area while you wait for it to heal. Do not, for example, wear a hat if you have an eyebrow piercing. You should always be aware of your hair if it's longer. Keep long hair from touching the piercing. You may have to pull your hair back more often as the piercing heals.  Avoid sleeping on the side of your body where the piercing is. Bacteria from your pillow can cause an infection. If you have something like a navel piercing, talk to your piercer on how to best protect it. You may have to wear gauze over the piercing or loose-fitting clothing.

===
Write a summary of the previous text in Vietnamese:
Ngâm nước muối. Tránh bơi lội. Đảm bảo không có bất cứ thứ gì chạm vào vùng xỏ khuyên.