El Chapo came down from the mountains during his time as a fugitive to undergo erectile dysfunction surgery in Tijuana … according to a Mexican newspaper.

Reforma claims sources close to the investigation told its reporter, Chapo received a testicular implant to improve blood flow … just a stone’s throw from the U.S. border.

The paper claims the surgery required anesthesia and an operating room and involved planting a prosthesis.

The report claims when Chapo was captured authorities found injectable testosterone, syringes, antibiotics and anti-inflammatories.