Many factors can cause infection in a body piercing. Most infections result from unsterile equipment or materials. In some cases, the piercing may be too tight, which prevents air from entering the channel. The additional pressure from tight piercings can restrict blood flow and increase the area’s vulnerability to infections. Some inexpensive piercings have rough edges that scratch the site. Many people have allergies to nickel, and many cheaper piercings contain large amounts of nickel. These allergies can cause an allergic reaction that develops into an infection.
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