Abnormalities in CITIC Bank's credit cards are caused by the bank's risk control. Banks will generally take measures such as blocking or reducing the credit limit of abnormal credit cards. The general reasons for abnormalities are:

1. The credit card is overdue, or there is a bad credit record in other banks, financial institutions, etc.;

2. The ID card has expired and the information needs to be updated;

3. Credit card violations;

4. I often swipe my card to make purchases in the middle of the night, and the consumption time is abnormal.

Generally, after a bank warns you of an abnormality with your credit card, you need to call customer service to solve the problem, and you cannot do it yourself.