The phrase "another can of worms" is often used to describe a situation or topic that is likely to cause more problems than it solves. There are several synonyms for this expression that can be used to convey a similar sentiment. Some of these include "a Pandora's box," "a hornet's nest," "a minefield," and "a troublesome issue." These phrases all suggest that delving into the topic at hand is likely to result in negative consequences or complications. Whether you choose to use "another can of worms" or one of its synonyms, it is clear that the topic at hand is best avoided altogether.