He aggravated the problem against Accrington a week later and has subsequently missed the Imps' last two matches.
Heath, who made 12 appearances for Forest last season, is back at the City Ground and will undergo a scan on Friday.
It is being widely reported that Leicester City are the favourites to sign Manchester City striker Kelechi Iheanacho, and if
Last week Wayne Rooney completed his return to boyhood club Everton, writing the final chapter in a fairy tale career.
Wayne Rooney has returned to Everton after 13 years at Manchester United.
Germany defender Antonio Rudiger has joined Chelsea from Roma on a five-year contract.
Wayne Rooney has closed the chapter on a Manchester United career that featured a raft of honours across 13 years.
Wayne Rooney has returned to Everton after a record-breaking career at Manchester United.