To start something that creates many new problems.
Comenzar algo que crea muchos nuevos problemas. (Comenzar algo que crea muchos nuevos problemas.)
"By questioning the policy, he opened a can of worms."
"Al cuestionar la política, él abrió una lata de gusanos." (Al cuestionar la política, él **abrió una lata de gusanos**.)
to become worse or decline in health
to deal with a problem when it happens, not before
someone who will never be your friend
to become less hot or less angry
a connected series of thoughts
to abandon someone or something suddenly