The little boy who became the face of Syria's suffering after a video of his bloodied face went viral has been reunited with his parents, the ABC has learned.

The video showed Omran Daqneesh sitting dazed in the back of an ambulance, having just been pulled from the rubble of his home after an air strike in Aleppo.

The nurse who treated Omran has told the ABC the boy did not cry as he was being treated, describing him being "in shock".

Dr Mohammed said any crowded areas including schools and markets are targeted by bombs. ( Supplied )

"He didn't say anything except to ask for his parents," Abu Rajab from the Syrian American Medical Society said.

"They arrived shortly after, in a second wave of people.

"Only then once Omran saw them did he start crying."

Omran's parents told medical staff they would not speak for fear of reprisal from forces allied to the regime of President Bashar al Assad.

Dr Mohammed, who treated Omran, said children with his injuries usually come in crying and screaming.

"But he didn't cry, only astonishment," he said.

Dr Mohammed asked for his identity to be withheld because of the Syrian Government's targeting of medical staff.

"It is very difficult for us to see those innocent children... many lose their lives or have to have their limbs amputated.

"The barrel bombs and the rockets are like rain daily in civilian area[s] and crowded area[s] like hospitals, schools and markets. Any crowded area, is targeted now."

The photos and video of Omran were taken on Wednesday night in the besieged rebel-held eastern suburbs of Aleppo.

Doctors say Omran had head wounds and was discharged from the M10 hospital.

Video taken by the Aleppo Media Centre showed the moment Omran was rescued along with three other small children from the rubble of a house after an air strike, by volunteers from Syria's Civil Defence group known as the White Helmets.

Doctors told the ABC he was brought in to the hospital by four young men.

One of the major battlegrounds of Syria's devastating civil war, the city of Aleppo is split between western areas held by the Government, backed by Russian warplanes, and eastern regions held by rebels.

Fighting between the two groups has intensified since mid-July, raising fears for the safety of an estimated 1.5 million civilians still in the city.

Omran Daqneesh being treated by doctors from the Syrian American Medical Society ( Supplied )

Russia ready for 'humanitarian pauses'

Meanwhile, Russia said it was ready to halt fire for 48-hour periods in Aleppo from next week, following UN calls to extend humanitarian pauses to deliver aid.

"Russia's Defence Ministry is ready to support the proposal by UN envoy to Syria Staffan de Mistura regarding the introduction of weekly 48-hour 'humanitarian pauses' [in Aleppo]," Defence Ministry spokesman Igor Konashenkov said in a statement.

United Nations special envoy Staffan de Mistura hailed the announcement and said he would work with Russia to iron out details of the planned ceasefire.

"The Special Envoy welcomes the Russian Federation statement, and the United Nations humanitarian team is now set to mobilise itself to respond to this challenge," Mr de Mistura said in a statement.

Earlier, Mr de Mistura said not a single aid convoy had reached besieged areas in the past month and he had abandoned a humanitarian aid meeting within eight minutes when all sides showed they were unwilling to change their ways.