MANILA- President Rodrigo Duterte will update Filipinos on the results of his doctor’s appointment on Wednesday as he nursed an aching spine that cut short his Japan trip, his spokesman said.

The President's doctors will check the effect of a recent motorcycle accident on his health, Presidential Spokesperson Salvador Panelo said, adding the public should not be "apprehensive."

"His consultation with a doctor is aimed at determining the medical condition of his body, as well as finding out whether his previous spinal injury from a past motorcycle accident has been aggravated by his recent fall," Panelo said.

"The President shall inform our countrymen on the result of his medical consultation," he said.

The 74-year-old Duterte cut short his visit to Japan on Tuesday due to “unbearable pain” in his spine. He is due to see a neurologist. He was in Tokyo for the enthronement of Japanese Emperor Naruhito.

Duterte last week fell off his dirt bike after he made a sharp turn at Malacañang compound, landing on his left elbow, according to his former aide, Senator Christopher "Bong" Go.

Two other versions had Duterte falling off his parked bike as he tried to tie his shoe, and another where he reportedly bumped into an obstruction on his way out of a garage in the compound.

Panelo last week said there was no need for the President to consult a doctor on the accident since Duterte only sustained “light bruises and slight scratches.”

• Duterte 'okay' after 'motorcycle accident' in Malacanang

In 2017, Duterte said he suffered from back pains due to an earlier motorcycle accident.

Duterte admitted to having myasthenia gravis, a chronic autoimmune neuromuscular disease, which causes "weakness in the skeletal muscles, which are responsible for breathing and moving parts of the body, including the arms and legs," according to the US National Institute of Neurological Diseases and Stroke.

The President also has Buerger's Disease, a cause of blockages in the blood vessels, associated with smoking during his youth.