"Occasionally I shut my account for 24 hours to clear (white male's) abuse," she wrote on November 3. "If you see the account, please know it will reappear within 24 hours."
In late October, she wrote of a "long-haired blond lady with prejudice" who O'Connor said she had questioned her for an extended period of time about why she had been hijabed since her conversion to Islam.
"But long hair is just a western version of hijab," O'Connor argued. "I shave it if you're really against hijab."
O'Connor's move to Islam is in the late '90s, she was ordained as a priest by the Irish Orthodox Catholic and Apostolic Church, a group not affiliated with the Catholic Church, which O'Connor has long been opposed.
Pope Francis in August this year to ask for the certificate to prove it.
The singer has also publicly struggled with mental health issues in recent years. In 2015, she admitted to overdosing after reaching a low point in her life. "I'm invisible, I do not matter a shred to anyone," she said at the time. "No one has come near me. I've died a million times with the pain of it."
Recently, O'Connor thanked "Muslim brothers and sisters" for welcoming into the religion, using the Arabic word for community, "Ummah".
"Thank you so much to all my Muslim brothers and sisters who have been so kind as to welcome me to Ummah today on this page," she wrote on Twitter.