In case of illness or incapacity for work, you can appeal to your health insurance.
Not only you, as a self-employed person, but also your spouse and children are eligible for such an insurance.

Your health insurance consists of two parts:

• Insurance against medical care
• Benefit insurance
  

Conditions
In order to be entitled to health insurance, you must:

• be a member of a health insurance fund
• have paid your social contributions

If you are ill, you can submit a request to obtain equality due to ilness. You no longer have to pay social contributions then.

Who qualifies for the health insurance
Increased compensation
Refusal or limitation of benefit
Periods of illness and disablement equated with periods of activity