The 30-year-old star was left bedridden for five months when she contracted Lyme disease - which can be caught from tick, flea or mosquito bites.
But despite the seriousness of her condition, Chad, 40, was sworn to secrecy by his wife, who asked him to keep schtum during interviews.
As the frontman of rock band Nickelback, this was no mean feat for Kroger, who is often questioned about his famous wife.
‘Things are looking up and definitely getting better’ Chad can now reveal, after his singer wife spoke out about her illness.
‘It felt like having all your life sucked out of you’ Avril told People magazine.
‘I had complete weakness and fatigue. One night I tried to brush my teeth on the tour bus and couldn’t even stand.’
‘I thought I was dying.’
Lavigne was in between the Asian and South American legs of her world tour when she first showed symptoms of the bacterial infection, waking up drenched in sweat and feeling feverish.
Doctors were reluctant to test her for Lyme disease, but after months of her symptoms persisting, Avril was finally diagnosed.
Since October she has been recovering at home in Ontario, Canada, with the help from her mother and husband Chad.
Get well soon Avril!