Quackery refers to health fraud involving products and services that have not been proven safe or effective. It is typically operated by individuals without proper medical qualifications who use meaningless jargon and scare tactics. Characteristics of health quackery include it being very lucrative, spreading rapidly, and preying on incurable illnesses. Forms include medical, nutrition, and device quackery. Psychological and physical harms can result. Complementary medicine is used together with conventional medicine, while alternative medicine is used instead of it. Approved alternative modalities in the Philippines include acupuncture, cupping massage therapy, reflexology, acupressure, and nutrition therapy.