A Thai man who had a metal ring stuck on on his penis for four months to increase its size has finally had it removed.

The unnamed patient, 35, had reportedly wrapped the piece of metal around his genitals as he wrongly believed it would make his manhood longer and thicker.

Unfortunately, the stainless wire ring eventually cut off circulation to his shaft, causing it to swell and become sore.

The man was rushed to the emergency room of the Krungthai General Hospital in Nonthaburi province on October 1 after he complained that the pain in his penis had become too much to bear.

The doctors, however, could not help him on their own, and had to call in volunteer firemen from the Ruamkatanyu Foundation to safely remove the ring from the local's bloated member.

Wielding cutters and power tools, the rescue team crowded around the man's nether regions and proceeded to hack away at the constricting accessory.

It took more than an hour for them to free the villager's willy as they were careful not to graze it with the sharp instruments.

Doctors said the ring was removed just in time, as the man's penis was on the verge of infection and was at risk of amputation.

Somchai Chokchai, one of those from the rescue group involved in removing the ring, said: 'The man said he had been wearing the iron ring on his genitals for four months. He hoped that it would make his penis bigger but it became inflamed because the blood could not circulate easily.

'The patient said he had been using rings on his penis for four years but this was the first problem.

'The device was carefully removed because if we did it wrong, it could cut and injure him. The whole process took more than one hour.'