Police and paramedics were called to a street late last night (Wednesday, July 11) after receiving reports a man had been stabbed.
Sussex Police said there was a disturbance in Pinders Road between 10pm and 11pm.
A police spokesman said: “Police found a 20-year-old man had been stabbed in the leg.
“An ambulance attended and it was established that a wound to the man’s thigh had been self-inflicted.
“He was taken to the Conquest Hospital in St Leonards for treatment.”
The spokesman added that no one else was hurt.