Footwear has come a long way since Roman armies conquered an empire wearing only sandals on their feet. But what’s old is new again, as sales of men’s sandals increase.

Along with the growing popularity of men’s sandals come more aches and pains for male feet. Doctors with the American College of Foot and Ankle Surgeons (ACFAS) say the wrong sandal could cause problems including heel pain, Achilles tendonitis, pain in the big toe and even breaks and stress fractures in some of the foot’s 26 bones.

ACFAS recommends that men shopping for a man sandal—or “mandal” as some people call it—look for a sturdy, cushioned, supportive sole and padded straps. Men living with diabetes should consult their foot and ankle surgeon before wearing sandals. Despite what many men may tell themselves, foot pain is not normal.