Mumford & Sons bassist Ted Dwane has posted a picture of himself on Twitter following treatment for a blood clot on his brain last week.
The musician, 28, was released from hospital in America on Friday and is now "on the road to a full recovery".
He posted a snap of himself with surgery scars visible on the top of his scalp, accompanied by the caption: "Bear with a sore head!"
"Thanks so much for all the well wishing, it seems to be working. I'm home. Ted xx"
Last Tuesday, the four piece folk band wrote on their website: "Our friend and bandmate Ted has been feeling unwell for a few days, and yesterday he was taken to a hospital to receive emergency treatment."
"The scans revealed a blood clot on the surface of his brain that requires an operation. Ted is receiving excellent care and we are being assured that he will recover quickly from surgery."
His release from hospital last Friday was announced "with great joy" by the band who said the "surgery went well and the excellent medical team helping him are very pleased with his progress."
It continued: "He has been nothing short of heroic in how he has handled the whole ordeal, and now it has been medically proved that he does indeed have a brain."
The band, who shot to fame with their debut album, Sigh No More, in 2010, had to cancel a string of dates on their American tour while Dwane was treated.
Mumford & Son are due to headline at Glastonbury on 30 June. It is unclear at this stage whether Dwane will be well enough for their appearance.