A very fit and healthy 21-year-old man with dreams of becoming a police officer is currently fighting for his life after push-ups triggered a very rare brain disease that was undetected since birth.

21-year-old Samuel O’Sullivan was exercising at their house when he started to experience excruciating pain in his head.

The man ran screaming to his parents, who then called an ambulance as the condition of Samuel deteriorated at a very fast rate.

Surgeons immediately performed emergency surgery on Samuel in a bid to control bleeding and remove pressure on his brain.

Doctors discovered that the 21-year-old had Arteriovenous Malformation (AVM), a very rare condition that involves tangled blood vessels connecting arteries and veins in the brain.

Samuel has now been moved to an intensive care unit in Melbourne, Australia.

He is currently paralyzed, with very limited use of body functions, which includes balance, coordination, and body movement.

The disease also left the 21-year-old boy with blurred vision and is currently unable to speak.

He communicates by squeezing the hands of his family members with his right fingers.

Samuel, the victim, was in the final stages of being accepted into the Victorian police academy.

7 days after he turned 21 years old, he suffered a stroke.

A GoFundMe page has been set up to cover the cost of his recovery.

The page has reached $37,000 of its $100,000 goal.

The father of Samuel said:

Sam has a knack of making people smile and is compassionate, has a great deal of empathy for others and is a most respectful young man. He had dreams like everyone else of owning his own home. For a young man, he had his head screwed on and had a clear eye on his future. Sam is in the fight of his life and is an inspiration to all of us but needs help along his journey.

Our thoughts and prayers are with the family of Samuel, may he recover fast from the deadly disease.