
Captain Aubameyang was sidelined after he contracted malaria while on international duty with Gabon in March and spent time in hospital last month.
The 31-year-old scored a second half goal after Mohamed Elneny found the opener as Arsenal moved up to ninth in the league table.
“I was really happy to be back first and scoring a goal,” said Aubameyang, who has scored 15 goals in all competitions for Arsenal this season.
“When you are out for a few weeks you realise how good it is to be back on the pitch.
“At the end for the last five minutes, I was dying a little bit. But to tell the truth, I felt good the whole game so I was really happy with that.
“I have to say that the doctors did incredible work with me … I’m really thankful for them.”
Arsenal host Villarreal in the second leg of the Europa League semi-final on Thursday, having lost 2-1 in the first leg in Spain.