"Take medicine after illness" is a famous saying, which means that we should try our best to prevent and avoid things before they have serious consequences. This famous saying is usually used in preventive medicine, warning people to pay attention to health care and prevent diseases in their lives, rather than waiting until they get sick before going to the hospital for medical treatment.

This famous saying can be extended to other aspects. For example, in company management, we should pay attention to personnel training and skills upgrading, rather than waiting for the problem to be solved to avoid similar problems from happening again. Similarly, in interpersonal communication, we should pay attention to friendly communication and timely communication, rather than waiting for the problem to be solved.

In short, the famous saying "take medicine after illness" tells us that we should take precautions in our lives to ensure that things can go smoothly, instead of waiting for problems to be dealt with immediately. In life, work, study and other aspects, we should find problems in time and solve them in time to avoid things becoming more complicated.