On-loan Wolves midfielder Emmanuel Frimpong was taken to hospital with an eye injury suffered during the 3-2 defeat by Aston Villa.
He was struck by the boot of Villa's Stiliyan Petrov's as he attempted a diving header.
Frimpong needed extensive treatment - eight minutes stoppage time was played - before he was carried off on a stretcher in the second half.
The 20-year-old is on loan from Arsenal until the end of the season.
"An initial examination revealed no head or spinal problems," read a statement on the Wolves website.
"However, he has a severe swelling around his eye and will need further examination to discover the extent of the problem."
Frimpong, who later returned to Molineux, added: "I can't remember too much about it to be honest.
"I remember heading the ball and, from what I heard, I then got a kick in the face. We'll just have to give it a couple of days and wait for it to settle down."
The midfielder, who played a key role in Wolves' first goal, had looked impressive before he had to be substituted in his third game for Mick McCarthy's side.
Frimpong had made 14 appearances for Arsenal this season - starting three Premier League matches, three Carling Cup ties and three Champions League games - before joining Wolves.