Meet Chris Stoyanov, 30, from Woking, Surrey.
For 17 years he had numerous operations to remove a tumour which began to grow on his scalp when he was a teen.
After moving to the UK surgeons removed the final tumour tissue, but had to remove a large portion of his scalp.
It left him with a huge bald patch.
Plastic surgeon Niall Kirkpatrick came up with this solution: a balloon gradually inflated with water to stretch the remaining skin on his scalp.
Chris says: "As the lump got bigger I tried to hide it with hats - which was a bit difficult because it was the middle of summer and it was boiling hot."
The hair began to grow back. He now has a full head of hair.
