Shirley decided to undergo tests when 'Strictly Come Dancing' viewers noticed a lump under her arm.
The 61-year-old judge is due to undergo further tests in hospital this week, but admitted she is trying not to worry.
The 60-year-old 'Strictly' judge has had seven stitches and is believed to have suffered tendon damage after slicing open her hand.
The 60-year-old dance teacher revealed doctors had found a lump between two bones in her shoulder while she was being treated for long COVID.
Shirley Ballas said she was trapped in bed for two weeks when she caught COVID-19 earlier this year.
Strictly Come Dancing judge Shirley Ballas has shut down rumours that Carrie Symonds will appear on this year's series.
Someone in the wardrobe department looks to have it in for one or two of this year's celebrities...