[5] In October 2015, Hedva delivered a lecture at the Women's Center for Creative Work titled, "My Body Is a Prison of Pain so I Want to Leave It Like a Mystic But I Also Love It & Want it to Matter Politically".
[8] Their influential essay Sick Woman Theory[9] "describes [their] own chronic, confounding illness and the impersonality of the Western medical industry, and suggests that the greatest enemy to capitalism is taking care of yourself and of others".
[8] Sick Woman Theory posed the question, "How do you throw a brick through the window of a bank if you can't get out of bed?
"[10] Influenced by Ann Cvetkovich's scholarship on depression, Sick Woman Theory takes illness as not a solely biological phenomenon, but a social and cultural one, claiming that "the body and mind are sensitive and reactive to regimes of oppression," and affirming the role of collective historical trauma in producing illness.
Of the essay, Dundee Contemporary Arts said: "In Defense of De-Persons" focuses more specifically on the American Psychological Association diagnosis of depersonalization disorder, or depersonalization/derealization syndrome, characterized by "experiences of unreality or detachment from one's mind, self, or body".
[14]In February 2018, Hedva published "Letter to A Young Doctor," in Triple Canopy's Risk Pool issue.
"[25] "The Times Literary Supplement writes "this Berlin-based artist regularly returns to the idea of sleep – as trauma and death, as labour and therapy, as communion and embodiment – and as an aesthetic practice.
"[27] Legacy Russell writes: "A thin permeable line between love and hate, pain and pleasure, self-love, self-flagellation, and total narcissism.
[32] In October 2018, Hedva began performing Black Moon Lilith in Pisces in the 4th House, a solo of guitar and voice, that became the album of the same name, released in 2021.
They continued touring the piece in the US and Europe including No End and No Beginning[34] in January 2020 at Wellcome Collection, London, and Creepy Teepee Festival in December, 2020.
Hyperallergic noted: "Johanna Hedva also ghosted after building a droning crescendo in the finale of “Black Moon Lilith in Pisces in the 4th House,” leaving the audience in the collective discomfort of loud sound and powerful vibration.
ArtReview called The Sun and the Moon “a black slurry of rich, harsh noise, industrial beats, and grainy samples.
"[40] In The Wire magazine, reviewer Claire Biddles points out Jeff Buckley influences and says that "Hedva moves at their own pace throughout the recording, but the songs aren't gentle for this—the analogy with grief, and the discomfort of those who witness it, is clear.