Lady Gaga suffers from ''chronic sadness'' when she is on tour because she feels so lonely.
Lady Gaga suffers from "chronic sadness".
The 'Poker Face' singer struggles to cope with homesickness while out on the road but has now learned to accept her "darkness".
She said: "The lowest point is loneliness, being on the road. I have a chronic sadness that recurs.
"The lowest point was in Australia in May. I was overwhelmingly sad, and I didn't know why because I had all these things to be happy about."
Despite her black moods, the singer says her emotional state inspired her to write her best ever material.
She added: "I went to the studio and played for hours and I wrote what is going to be the greatest record of my career, a beautiful song about my father.
"I remember watching the mascara tears flood the ivories and I thought, 'It's OK to be said.' I've learned to love my darkness."