A woman was horrified when what she thought was a harmless bite of holiday bug turned out to be flyworms embedded in her head.
The 55-year-old tourist, who was not named, returned to the UK from a trip to Uganda, Africa, with a head swelling.
The women went to their doctor nine days later complaining of swelling and pain, and were initially sent home with antibiotics for an infection.
But on a second visit to his doctor, a closer inspection found fly eggs in the center of his pus-filled lump, as documented in the British Medical Journal.
A small opening was found in the middle of the lump, which experts say was a breathing hole for a fly or larva.
The BMJ describes how doctors applied vaseline to the area before "a larva was extracted manually and sent to the London School of Tropical Medicine for examination."
The larva was identified as the Lund fly – a rare species of African rainforests.
Another ultrasound in the woman found another worm inside her head, causing her to undergo surgery for removal.
Medical expert Farah Shahi, an infectious disease specialist at the York Teaching Hospital in the UK, told LiveScience that a fly or larva probably laid eggs on a towel she used to cover her hair and bury her forehead.
The woman has recovered, and the report's authors have noted only one other case recorded in the UK since 2015.