The singer is said to be suffering from severe physical pain.
It comes after she pulled out of a performance at Brazil's Rock In Rio festival and a concert in Montreal.
The 31 year old suffers from fibromyalgia and a statement issued by promoter Live Nation says this has impacted her ability to perform.
In an emotional post on Instagram, Lady Gaga says she's been "searching for years to get to the bottom of" her condition.
I have always been honest about my physical and mental health struggles. Searching for years to get to the bottom of them. It is complicated and difficult to explain, and we are trying to figure it out. As I get stronger and when I feel ready, I will tell my story in more depth, and plan to take this on strongly so I can not only raise awareness, but expand research for others who suffer as I do, so I can help make a difference. I use the word "suffer" not for pity, or attention, and have been disappointed to see people online suggest that I'm being dramatic, making this up, or playing the victim to get out of touring. If you knew me, you would know this couldn't be further from the truth. I'm a fighter. I use the word suffer not only because trauma and chronic pain have changed my life, but because they are keeping me from living a normal life. They are also keeping me from what I love the most in the world: performing for my fans. I am looking forward to touring again soon, but I have to be with my doctors right now so I can be strong and perform for you all for the next 60 years or more. I love you so much.
A post shared by xoxo, Gaga (@ladygaga) on
The European leg of her Joanne tour was due to begin this week.
Her team says it will be rescheduled for early next year, and that the second leg of her North American tour will go ahead as planned.
Get well soon Gaga!
Cover image and Twitter images via @ladygaga on Instagram
