One of the most prominent psychosomatic illnesses in the play is Lavinia's hysteria. Throughout the play, Lavinia displays various physical symptoms that manifest as a response to the emotional trauma she has experienced. These symptoms include fainting spells, difficulty breathing, and a general feeling of weakness and exhaustion. These physical manifestations serve as an outward expression of the inner turmoil and emotional suffering Lavinia is experiencing as a result of her repressed desires, conflicting loyalties, and feelings of guilt and shame.
Orin, Lavinia's brother, also exhibits signs of psychosomatic illness. He suffers from insomnia and is prone to violent outbursts and episodes of sleepwalking. These symptoms can be seen as a reflection of Orin's inner turmoil, his struggle with forbidden love, and his guilt over the death of his father. The sleepwalking, in particular, represents Orin's attempt to escape from the oppressive puritanical environment and the underlying tensions that haunt his waking life.
The relationship between the puritanical setting and psychosomatic illness is further highlighted through the character of Christine, Orin's wife. Christine, who comes from a more liberal background, is portrayed as more emotionally healthy and well-adjusted than the Mannon siblings. She serves as a contrast to the repressive puritanical environment and its detrimental impact on the other characters.
Overall, the psychosomatic implications of puritanism in Mourning Becomes Electra reflect the play's exploration of the darker aspects of human nature and the psychological toll of living under rigid and oppressive moral codes. The play suggests that the denial of natural desires and the suppression of emotions can lead to severe psychological distress and physical illness.