Beyonce's sister Solange reveals nervous system disorder and cancels show

Experimental R&B singer Solange has revealed that she suffers from an autonomic nervous disorder after cancelling a New Year’s Eve performance in South Africa.

Solange, the younger sister of pop superstar Beyoncé, said doctors had advised her not to make the long journey from the United States.

“The past five months I have been quietly treating, and working through, an autonomic disorder,” she wrote on Instagram on Wednesday.

“It’s been a journey that hasn’t been easy on me. Sometimes I feel cool, and other times not so cool at all.”

Autonomic disorders affect the nervous system, which can have wide effects on the body’s functions.