Ferret Coughing and Spits Up Foam?

ChristaYoko
I have a ferret that is 3 years old, male, neutered. He seems relatively healthy; eats, drinks, sleeps, normal poop and pee. My ferret has been going behind and underneath the recliner and coughing/hacking something up and then spitting up a white foam for the past week. Today he did it twice (he was out for 3 hours or so). I am really concerned about him, please let me know what is going on with him. by the way, I am 18 and going to college and I live with my family. My mom refuses to pay any vet bills so I am on my own with that. Please help me and my ferret!
Updates
+1 y
We keep the house really clean and I clean his cage once a week sometimes twice. I do not use chemicals when cleaning his cage by the way. I know that he hadn't gotten into anything unusual, I keep a good eye on him. Thank you for all of your answers!
Ferret Coughing and Spits Up Foam?
9 Opinion