A 19-year-old from Sleaford was arrested on suspicion of carrying out an attack with a bottle.
The victim was walking home with friends when they were hit in the face with a bottle. They suffered facial injuries.
Police were called to Lincoln Road in Sleaford at 10.10pm on Saturday, January 19 to reports of an assault.
Inspector Ian Richardson said: “I can confirm we have arrested a 19-year-old on suspicion of GBH with intent.
“I wish to reassure the community that this appears to be an isolated incident with no wider impact on community safety.
“Anyone with any concerns can contact their local police force via 101 or by attending Sleaford Station.”
The 19-year-old who was arrested has since been released while under investigation.
Anyone with information about the assault is being urged to speak to the police on 101, quoting incident 424 of January 19.