By not getting treatment you increase your chances of developing:

• serious liver disease
• cirrhosis
• permanent liver damage such as liver cancer
• liver failure

Drinking alcohol

If you have hepatitis C and you drink large amounts of alcohol you increase the risk of serious liver damage. 

People with HIV

If you have HIV you have a greater chance of developing liver damage and cirrhosis if you have hepatitis C. If you have both, you need to get treatment.