Mumford & Sons bassist Ted Dwayne on the mend

British folk band Mumford & Sons’ bassist Ted Dwane posted a message on Monday saying he was recovering after brain surgery to remove a blood clot.

Dwane posted a picture of himself with a shaved head on the band’s official website with the caption, “Bear with a sore head! Thanks so much for all the well wishing, it seems to be working! I’m home.”

The Grammy-winning London band was forced to cancel the final three US dates of its “Summer Stampede” tour last week after doctors discovered a clot on the surface of Dwane’s brain, which required immediate surgery.

Hawaiian folk musician Jack Johnson filled Mumford & Sons’ headline slot on Saturday at the Bonnaroo music festival in Manchester, Tennessee.

The four-member band, which formed in 2007, also includes Marcus Mumford, Winston Marshall and Ben Lovett. They won Album of the Year for Babel at the Grammy Awards in February.