Treating a stressed hibiscus involves addressing the underlying cause of stress and providing appropriate care. Start by identifying the specific stressor, such as overwatering, inadequate sunlight, nutrient deficiencies, or pests. Adjust the watering routine, ensure proper drainage, provide sufficient sunlight, and consider applying balanced fertilizer to correct nutrient deficiencies. Additionally, protect the plant from extreme temperatures, drafts, and pests. Regular monitoring and proper care will help the hibiscus recover.