Hawthorn youngster Jai Serong will spend at least the next two months on the sidelines after being diagnosed by a Specialist Sports Cardiologist with pericarditis on Tuesday.

Pericarditis is an inflammation of the saclike tissue that the heart lies within and can often cause sharp chest pain.

Hawthorn Doctor Liam West said Serong will require a period of strict exercise restriction whilst taking medication throughout his recovery.

"We have been working closely with a Specialist Sports Cardiologist to ensure Jai's health is paramount to how we navigate this issue. The Cardiologist believes Jai developed pericarditis after a viral infection that didn't show symptoms," Dr West said.

“Jai’s activity levels will be minimised to just walking and stretching across the next 30 days.

“Further tests will be required before Jai is cleared to begin a graded exercise program.

“Jai is no longer experiencing chest pain but is obviously disappointed that he will need a period of time out of training and match play.

“We will ensure that Jai receives the best in medical and wellbeing support during this period.

“We would also ask that the privacy of Jai and his family is respected through this time.”

See the full update from West on Serong's diagnosis below.