From BRAIN SURGERY…gotta love modern medicine.  More below,

Mumford & Sons bass player Ted Dwane is sporting a shaved melon and a gnarly head scar following last week’s emergency surgery for a blood clot on his brain … and this morning, Ted shared a pic of his new look.

Dwane — who usually sports a long shag — shared the photo on the band’s official blog along with the message, “Bear with a sore head! Thanks so much for all the well wishing, it seems to be working! I’m home.”

His bandmates had a sense of humor about it … saying, Ted “has been nothing short of heroic in how he has handled the whole ordeal, and now it has been medically proven that he does indeed have a brain!”