Olsen Sister Diagnosed with Lyme Disease

Mary Olsen's sister Kate has been going through a tough time after being diagnosed with Lyme disease.

According to reports, the bacterial infection which is usually caused by tick bites is said to be in its late stages.

The delay in detection has affected the 28 year old fashion designers ability to work since she often ends up being unwell.

In an interview to OK magazine, an insider said, "She's really sick. It's gotten worse. She was diagnosed in the very late stages so early detection measures weren't options for her. She's really going through it.

"When she does come to work, she looks haggard and dishevelled. And she's often moody. Ashley's having a very rough time right now."

When diagnosed with lyme disease, the patient usually experiences pain the joints and skin. In some cases, the illness could also affect the nervous system and the heart.

Canadian singer Avril Lavigne was also diagnosed with the disease last year which led to her being bedridden for more than 5 months.

While speaking about the illness, Lavigne said, "I had no idea a bug bite could do this."

"I felt like I couldn't breathe, I couldn't talk and I couldn't move. I thought I was dying."