“Like a bear with a sore head”in other languages

Same idea, different pictures

English chooses a bear in pain, dangerous enough already. French is so foul-tempered it can't be picked up even with tongs, pas à prendre avec des pincettes, or is in a bad hair, de mauvais poil.

Spanish has bad milk, mala leche, from an old belief that a baby took its character from the milk it drank. It can mean a foul mood or plain bad intentions.