Cephalosporins are a class of anti-inflammatory drugs, and these drugs mainly have a killing effect on bacteria. Cephalosporins are divided into four generations according to different classes. First-generation cephalosporins are mainly effective against positive bacteria, third-generation cephalosporins tend to be mainly effective against negative bacteria, and second-generation cephalosporins are between positive and negative bacteria, both of which have certain effects. For the fourth generation cephalosporins, it covers a wider range and has a good effect on most of the positive and negative bacteria. However, when using cephalosporins, the choice is based on different types of diseases and different causes. It is also important to note that cephalosporins have certain allergic reactions and to do the appropriate skin test and the appropriate treatment means.