Halsey was in hospital this week after suffering a "very scary" seizure.
Halsey suffered a 'very scary' seizure
The 29-year-old singer shared a video of herself in a hospital bed with her fiance Avon Jogia by her side as she opened up about her condition.
Alongside the clip on Instagram, she quipped: "Happy Late Bi Visibility Day.
"This year I’m celebrating by dying with a man by my side (for legal reasons that’s a joke).”
The 'Lucky' singer later responded to fans asking more about her health scare on X, formerly Twitter, as one person wondered if her hospitalisation was due to a chronic health issue.
Halsey - who has been candid about her struggles with endometriosis and other conditions - wrote: "“I had a seizure! Very scary! Don’t recommend it!”
And she reassured another follower that she is safely back at home now.
She added: "I’m home from the hospital now after a few days, so a win is a win!”
Over the summer, she opened up about her health battles, which has seen her get "sick very often", and lose "a lot of weight".
Last month, she told the 'SheMD' podcast: "I have lupus and sometimes with Lupus there’s other complications.
“I announced a couple years ago that I had Sjogren Syndrome which is really often comorbid — meaning going alongside of — Lupus.
"Because Lupus is an autoimmune condition, sometimes it can supress your immune system to the point that you develop a T cell disorder.”
Halsey - who has three-year-old Ender with screenwriter Alev Aydin - recently admitted she was "terrified" after becoming ill shortly after giving birth.
She told The Hollywood Reporter: "I was in that in-between space, waiting for answers from doctors for months of like, you know, not only could I be not in a position where I get to be a musician anymore, but I don’t even know now if I’m going to get to be anymore. And that was terrifying.
"Kind of like the greatest thing in the world ever happened to me [becoming a mom]. And then all of a sudden, a really scary thing happened to me.
"And then I knew that I had to start writing because I knew that that was going to help me process what was going on."