Yoga reduces the stress response and the pain cascade via the downregulation of the hypothalamus-pituitary-adrenal (HPA) axis and vagal stimulation. Yoga therapy can help people recover from injuries and surgeries, manage chronic conditions, reduce or eliminate symptoms in conditions like diabetes, constipation, hypertension, indigestion, hernia, menopause, arthritis, slipped disc, sciatica, cervical spondylitis, migraine, thyroid, varicose veins, stress, anxiety, depression, knee pain, piles, hyperacidity and PCOD / PCOS.