This is the heartbreaking image of a seven-year-old boy laying exhausted on his couch after undergoing chemotherapy.
Logan Sellers, from Bangor, Wales, was diagnosed with rhabdomyosarcoma after a lump developed behind his eye.
His condition causes him to wake up in the middle of the night and often makes him lash out at his parents in frustration.
But now the twin has become so poorly that he often turns down food and isn't interested in playing with his toys.
His father, James, 37, decided to post a heart wrenching picture on Facebook of his son just after chemotherapy to let others know just how badly he is affected.
His family have since temporarily relocated to the US as Logan receives pioneering treatment to fight his cancer which isn't available in the UK.
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Mr Sellers told the Daily Post: "The main reason I posted a poorly picture was to show the harsh reality behind the scenes.
"Logan is a cancer patient, he is really poorly and it affects him in ways people can't imagine.
"To be honest it's uncomfortable and upsetting to talk about but it's only through people like me that people can be educated."
On a bad day, Mr Sellers says Logan, who also suffers from cerebral palsy, spends the entire time vomiting as a result of his rare cancer.
Rhabdomyosarcoma is more common in boys than girls. The tumours develop from muscle and can grow in any part of the body, but the cause remains unknown.
He also has been known to wake up in the middle of the night, sweating, screaming and crying as a result of his disease.
But it can take up to an hour just to try and calm him down as he will often hit out at his father during an aggressive bout.
In a video posted to the Facebook group "Logan's Journey", Mr Sellers said: "He doesn't know how to express feelings so he gets emotional and upset very easily.
"It's difficult to plan anything because we don't know what he will be like the next day."
The Facebook page was designed to document Logan's journey through chemotherapy at the Royal Manchester Hospital.
Currently, the family live in the US while Logan receives proton therapy - a type of radiation which can more accurately pinpoint and kill tumours - that is not available in the UK.
The NHS are funding the treatment but the family have since created a GoFundMe page to appeal for living costs while they are based abroad.