The social security card was cancelled for no reason.

Legal analysis: 1. Social security (medical insurance) card is not paid in time, and the medical insurance function is suspended; Second, the hospital system is out of order; Third, the system information is wrong; Fourth, ensure that there is enough balance in the social security card; 5. Other reasons: the social security card chip is damaged, demagnetized, the card surface is damaged and layered, and the original minor is over 16 years old and fails to change the card in time. It will also lead to the social security card not being used normally.

Legal basis: People's Republic of China (PRC) Social Insurance Law.

Article 1 This Law is formulated in accordance with the Constitution for the purpose of adjusting the social insurance relationship, safeguarding citizens' legitimate rights and interests in participating in social insurance and enjoying social insurance benefits, enabling citizens to share the fruits of development and promoting social harmony and stability.

Article 2 The state establishes social insurance systems such as basic old-age insurance, basic medical insurance, industrial injury insurance, unemployment insurance and maternity insurance, so as to guarantee citizens' right to receive material assistance from the state and society in accordance with the law in case of old age, illness, industrial injury, unemployment and maternity.

Article 3 The social insurance system adheres to the principles of wide coverage, basic protection, multi-level and sustainability, and the level of social insurance should be compatible with the level of economic and social development.