The Welshman featured in three matches for the Gunners in April after overcoming a thigh strain.
The midfielder told the club's official matchday programme for this weekend's game against West Bromwich Albion: "I've felt good since I came back. It was really frustrating being out, missing so many games and it took longer getting back to fitness than I'd have liked. But it's great to be back.
"It was really pleasing for me [to score] up at Hull. Hopefully I can get one or two more before the end of the season."
Arsenal can secure a place in the Champions League for next season with a win this weekend.