under 18
pregnant or breastfeeding
metallic implants such as pins, prostheses
pacemakers
epilepsy
certain types of cancers
blood disorders
fever or acute inflammation
heart disease
kidney & liver disease
severe high blood pressure or circulation problem
hemorrhagic disease, trauma & vascular rupture
inflammation of the veins
taking steroids for long time
active infection
internal bleeding & or ulcers
autoimmune diseases
red, dry and itchy skin rash
transmissible disease
during mesnstruation (avoid abdomen the first 3 days)