the regressive tendency in a psychotic case is part of the ill individual’s communication, which the analyst can understand in the same way that he understands the hysterical symptom as a communication.
Winnicott explicitly names the hysterical symptom as the paradigmatic instance of symptom-as-communication and extends that logic to psychotic regression, framing both as messages the analyst must decode rather than behaviours to suppress.
, The Maturational Processes and the Facilitating Environment, 1965thesis