The incident happened in Ilford Lane near Winston Way just after 4pm yesterday (January 1).
Officers and London Ambulance Service attended and found a man who had been stabbed.
He was taken to an east London hospital where his injuries were assessed as non life-threatening.
A 38-year-old man was arrested in connection with the incident at a residential address in Romford.
He has been taken to an east London police station where he remains in custody.
Police enquiries into the circumstances continue.
A spokesperson for Metropolitan Police said: “Police were called at 16:05hrs on Wednesday, 1 January to reports of a stabbing in Ilford Lane.
“Officers and the London Ambulance Service attended and found a man aged in his 20s suffering from stab injuries.
“He was taken to an east London hospital where his injuries were deemed to be non life-threatening.
“At about 19:30hrs, a 38-year-old man was arrested at a residential address in Romford.
“He has been taken to an east London police station where he remains in custody.
“Enquiries continue.
“Anyone with information is asked to call police on 101 or message @MetCC quoting 5708/01JAN.
“Alternatively you can contact the independent charity Crimestoppers on 0800 555 111 or visit crimestoppers-uk.org.”
