Risk factors of having your tongue, lips, and cheeks pierced includes:  

• Dangers like chipped and fractured teeth 
• Damage to your gums 
• Periodontal disease 
• Problems with speech 
• Swallowing and chewing 
• The studs themselves could be harboring bacteria increasing risks for infection. 

Studies found that studs made of steel seemed to promote the development of a biofilm, a thin layer of microorganisms that adhere to the surface of a structure. Types of bacteria associated with staph infections were found on the steel and titanium studs, leading researchers to conclude that metal studs increase risks for complications if a piercing channel becomes infected.