The 31-year-old musician was slammed by anonymous tweeters for defending refugees who suggested she had mental health issues, reported BBC.
To which the "Smile" singer replied, "I DO have mental health issues. Bipolar, post-natal depression, and PTSD, does that make my opinion void."
Allen who has two children said in another tweet her son was stillborn at six months in the year 2010.
One of the trolls even suggested has she not taken drugs she "wouldn't have miscarried" and Allen replied, "I didn't miscarry, I went into early labour and my son died from his chord wrapped round his neck."
Allen's account in now being handled by her friend Dennis.