The 37-year-old 'Kaho Naa... Pyaar Hai' star hurt her knee last week while shooting an action sequence in her film.
"Thank you my tweethearts for all the concern... Got injured a few days ago... Fell very badly during an action sequence.. Knee is hurt but recovering," Ameesha posted on Twitter.
A doctor was immediately summoned on the set.
"Doctor was called and I was administered medicines and injections immediately. Sorry didn't tell you all last week when it happened but didn't want it to worry anyone..," she added.