This is the heartwarming moment a five-year-old girl tended to her elderly grandfather during his medical treatment.

Mali, the caring young granddaughter, helped suction the bedridden man's phlegm in Bangkok, Thailand, on March 25.

The ailing pensioner had suffered a stroke and required constant care, prompting the child and her mother to look after him.

The girl was making origami in the living room when she heard her grandfather coughing. With her mother not around, she quickly aided the elderly patient.

CCTV footage shows Mali running toward him and beginning to remove the mucus.

She can be seen standing behind him and placing a hose attached to a medical aspirator.

After checking if the congestion had cleared, she cleaned the device and put it back in place.

The mother recalled that she was in the bathroom when it happened.

She said: 'When I came back, I saw my daughter running to me, smiling, and telling me what she had done. I am proud of her because even though I never taught her how to do it, she was able to do it correctly.'