Jared Payne will undergo further tests on the migraines that ended his British and Irish Lions’ tour of New Zealand.
Lions medical chief Dr Eanna Falvey admitted there remains no clear return date for Payne, despite the 31-year-old progressing through a significant number of tests.
“He’s actually suffering from migraine,” revealed Dr Falvey.
“He had a bang in the Chiefs game (on 20 June), but he was fully cleared from concussion.
“But he’s been struggling with migraines and that’s an independent process since then.
“The specialist is quite happy with him. He’ll have a couple more minor tests, and that will give us more idea. But while he still has a headache, he won’t be training.”
Meanwhile, Ireland and Leinster centre Robbie Henshaw could face a four-month lay-off after tearing his pectoral muscle off the bone.
“The muscle needs to be reattached, and that’s usually about a 16-week recovery,” Dr Falvey said.
“He may do slightly better, but that’s probably what we’re looking at.”