This case study details a Dharma practitioner's journey in using spiritual practices to help her father overcome severe, long-term urticaria. Her father's condition, which began after killing and consuming live aquatic animals, gradually worsened despite extensive treatments with both Western and traditional Chinese medicine. When these interventions failed, the practitioner turned to the Guan Yin Citta Dharma Door, implementing the Three Golden Buddhist Practices. She dedicated herself to reciting Buddhist scriptures on her father's behalf, while he progressively adopted vegetarianism and Buddhist practices. Ultimately, he experienced a profound, lasting improvement in his skin condition, which doctors had previously deemed incurable. This case highlights the potential role of Dharma in addressing karmic illnesses and its significance in treating conditions viewed as spiritual or karmic in origin.