LONDON—A tweet from London Inspector Jack Rowlands, the equivalent to an American detective, is gaining internet fame for its harrowing image of a stairwell lined with knives.

Rowlands shared the photo on Twitter to show the parts of domestic abuse that stays behind closed doors.

That's one life saved.

But domestic violence is more than bruises and fights; there is a fear and an oppression that occurs and it's rarely spoken about.

Many people are speaking out on Twitter saying the stairwell looks sinister, like something from a horror film. But this was one woman's reality.

According to the National Coalition against Domestic Violence, on average, nearly 20 people per minute are physically abused by an intimate partner in the U.S.

One in four women, one in seven men have been victims of severe physical violence by a partner in their lifetime. One in seven women and one in 18 men have been stalked to the point they felt that they or someone closed to them would be harmed or killed.

Despite those high numbers, only 34 percent of people who are injured by intimate partners receive medical care.

If you or someone you know is experiencing domestic abuse there are many resources to keep you safe. Call your local authority, or the National Domestic Violence Hotline for help.