ascetic fever
Ascetic fever is a pathological zeal to inflict excessive suffering on oneself in pursuit of spiritual superiority. Under the guise of discipline or self-denial, one endlessly repeats meaningless austerities as if they were sacred rituals. The sufferer convinces themselves of self-purification, but to observers it resembles nothing more than vanity. Criticism is met with the claim that pain is the truest proof of virtue. In the end, all it yields is pity and exasperation.