Signs of breast cancer are not always a lump in the traditional sense, so what should you look for?
Actress Lucy Davis, who played Dawn Tinsley in the original UK version of the popular TV series The Office, has revealed she has incurable breast cancer.
On Instagram, external, the 53-year-old said it had spread to her bones and it was too late for chemo.
She added: "The initial lump that I felt, wasn't a 'lump' as such; rather a kind of hard spot. Really tiny."
The NHS says to check your breasts, external or chest about once a month.
That helps you learn what looks and feels normal for you, making it easier to notice any abnormal changes.
Breasts can naturally look and feel a bit different at different phases of your menstrual cycle, and change a bit as you age.
a lump or swelling in your breast, chest or armpit
a change in the skin of your breast, such as dimpling (it may look like orange peel) or redness, which may be harder to see on black or brown skin
a change in size or shape of one or both breasts, or either side of your chest – it's common for breasts to be different sizes, but check for any changes that are not normal for you
nipple discharge (if you're not pregnant or breastfeeding), which may have blood in it
a change in the shape or look of your nipple, such as it turning inwards (inverted nipple) or a rash appearing on it (it may look like eczema)
Look at your breasts or chest in a mirror to look for any changes. Start with your arms by your sides and then raise them up.
Feel around each breast or side of your chest in a circular motion all the way up to your collarbone and under each armpit. Use a mix of light and firmer pressure. Do not press so hard it hurts.
you have a lump or swelling in your breast, chest or armpit
you have any changes in your breasts, chest or nipples that are not normal for you
you have pain in your breast or armpit that does not go away
The Office actress Lucy Davis says she has 'incurable' cancer
Breast cancer checks missing most women under 50 who are at risk, says study
