United Kingdom, Aug. 4 -- Jessie J is "feeling a lot stronger" after being discharged from hospital.

The 37-year-old pop star - who underwent surgery for breast cancer six weeks ago - was treated for an infection and fluid on her lungs last week but she discharged herself to continue her recovery at home and she's now told fans she's feeling much better.

In a video posted on Instagram, she explained: "Two or three days ago when I woke up and couldn't breathe. I still have pain in my chest when I breathe but it's not as bad. And I have very few other symptoms. So I'm hoping it's just a viral p*** take ...

"I am feeling a lot stronger, I just wanted to share for anyone else that needs reminding, that's going through something ..."

Jessi...