Yaws is a chronic and debilitating childhood infectious disease that affects the skin, bone and cartilage. The disease is caused by spiral bacteria of the genus Treponema. A single, itchy, raspberry-like growth develops on the skin, which eventually develops a thin, yellow crust.

It can also cause swollen lymph nodes, bone and joint pain, painful bumps and sores on the skin and on the soles of the feet and in developed cases it can cause facial swelling and disfiguration.

80,000 cases were suspected globally in 2018*
*approx.

Number of confirmed yaws cases and status of endemicity

Further information

WHO
Factsheet

Source: WHO data 2018