The 28-year-old 'Mean Girls' actress, who was diagnosed with the virus last month, was admitted to King Edward VII's Hospital this week because she was suffering from unbearable joint pain and a high fever, reported TMZ.
However, doctors decided to let Lohan go home because her fever finally broke and have now referred the star to a specialist who treats the virus, which she contracted through mosquito bites while on holiday in Bora Bora.
The actress' concerned mother Dina Lohan is on her way to London to be with her, according to sources.
The Chikungunya virus causes fever, joint paint, fatigue and a rash but has no cure and the symptoms can last for months.