Dr Nyasha Masuka, medical director of Matabeleland North Province, told news website My Zimbabwe: "It seems the other boys were laughing at him for not being circumcised so he used a machete to circumcise himself and he injured himself in the process.'
"He was rushed to St Lukes Hospital where the health staff circumcised him."
Dr George Mature, medical officer for Lupane district, said other patients at the hospital were 'shocked' that the boy had had the courage to take the weapon to his own penis.
He said: "The patients who were admitted with him were wondering how he managed to do it.
"The good thing is that he wounded the outer layer of foreskin. So we had to keep him at the hospital to monitor him as he had used a clinically inappropriate tool so we were worried that it could have caused an infection."
The incident comes less than a month after a 10-year-old boy had the tip of his penis chopped off after a routine circumcision operation went horribly wrong.
The boy, who has not been named, was rushed to a hospital in the Malaysian capital, Kuala Lumpur, after the incident at a clinic in a local suburb, which it is believed the surgeon's laser scalpel might have slipped.