When a man presented to ED with foot pain but no obvious cause, doctors had to go over his case with a fine-tooth comb.

The 35-year-old had been experiencing discomfort for eight hours and denied any foot or ankle injuries.

While the doctors — based in Sao Paulo, Brazil — did not notice anything initially, after asking the patient to walk on his heels and tiptoes, they re-examined his right foot.

It was there they discovered the sole reason for his pain: a 5mm hair penetrating his heel.