Surjeet Singh from Amritsar in northern India complained to medical experts that had been suffering from severe stomach aches and a low appetite.
They initially thought he had developed a tumour but a biopsy revealed metal inside his body.
Mr Singh suffered from a disorder that gave him an urge to swallow knives, according to surgeon Jitendra Malhotra.
The patient said he developed the habit while he recovered from a traffic accident in Chandigarh.
He said: "I could not walk properly...
Man swallowed 40 Knives yet still wants more
They initially thought he had developed a tumour but a biopsy revealed metal inside his body.
Mr Singh suffered from a disorder that gave him an urge to swallow knives, according to surgeon Jitendra Malhotra.
The patient said he developed the habit while he recovered from a traffic accident in Chandigarh.
He said: "I could not walk properly...
Man swallowed 40 Knives yet still wants more