Nǐ de tóufa luàn de xiàng gè niǎowō, qù shū yi shū ba.
Your hair is as messy as a bird's nest — go comb it.
Tips
culture
鸟巢 (Niǎo Cháo) is the nickname for the National Stadium in Beijing built for the 2008 Olympics. Note the difference: 鸟窝 is an informal/colloquial word for a bird's nest or messy hair, while 鸟巢 is the formal term used for the stadium.