This lady has a seriously important warning for all women

You've probably heard the advice that you should regularly check your breasts and underarms for any unusual lumps. It's good advice and extremely important to help as many people as possible catch breast cancer early - whilst it's still treatable.

Mysterious lump that could only be felt while lying down

However, often this advice encourages women to check their breasts whilst in the shower. Whilst this can be a convenient time, Hayley Browning discovered that it's not always possible to feel lumps whilst standing up, as she found a lump in her breast whilst lying down that couldn't be felt at all when she was standing.

A message for all

Worried that many more women could be missing this important warning sign, Hayley decided to write a life-saving Facebook post to educate other women about her experience:

I could only feel the lump whilst lying down and it completely disappeared standing up. Most websites tell you to check for lumps in the shower but if I had followed this advice, the lump may have grown too large to be treatable. Not even the surgeon could feel my lump when I was standing up.'

Check out the video above for more of Hayley's inspirational story.