Lindsay Lohan jokes about her illness

Los Angeles: Actress Lindsay Lohan has joked that her thong is helping her fight off chikungunya.

After contracting chikungunya, a mosquito-transmitted virus that causes fever and severe joint pain, while vacationing in Bora Bora, Lohan posted a photo for herself in a skin-tight top and a Calvin Klein thong.

"#mycalvins are helping me fight off my chikungunya. Hehe," she captioned the picture. 

Though she's able to laugh about the situation, friends say she's not always feeling her best. Her joint pains "come and go", a source told people.com.