Just had a friend come back from the doctors after having some red, itching marks just near his stomach. It's been red and itching for 2 weeks. Doctors found a filariasis worm from a mosquito under his skin. Doctors had to cut into his skin, leaving him with 3 stitches.
He just came back from holidays in Thailand, so it was either a mosquito in Thailand or one in Japan.
Interesting facts Beware of the females! 
- Mosquitoes can transmit diseases, such as malaria and West Nile Virus.
- Females require protein for egg development. Since the mosquito diet consists of nectar, which has no protein, most must drink blood.
- Males have mouths that are not suitable for blood sucking.
- Most species of mosquito can carry the filariasis worm, a parasite that causes a disfiguring condition characterized by a red swelling area on the skin surface.