✔ 最佳答案
No, that is not normal. Green discharge is an absolute no-go: Get to the doctor immediately. In the mean time, keep the area clean, i.e. gently clean it several times a day. You will probably need antibiotics.
Sounds like the water wasn't clean and/or you had a cut somewhere in your ear. Always dry your ears after getting out of the water and drain them gently (don't shake your head). It's better to just wear plugs.