Essentials for diagnosis  
(1) The patient has the history of upper respiratory tract infection, or diseases induced by administration of certain drugs or food.
(2) Purpura appears mostly on lower limbs and buttocks often with symmetrical distribution and various shapes, the colour of which does not disappear by pressing. It is possibly accompanied by swelling and pain of joints, hematochezia, hematuria, edema, etc..
(3) Platelet count, bleeding time and coagulation time and clot retraction time are all normal.

In TCM, a disease or a symptom might be caused by one pathogenic factor, even two or three pathogenic factors. When diagnosing a disease or a symptom, TCM doctors must follow the principle of "Syndrome Dfferentiation", and then "Suit the Remedy to the Case". In order to gain a more definite and valuable diagnosis, it's important and necessary for the doctor to learn the detailed health information of the patient, including his/her disease duration, age, sex, height, weight, family history, urine, stool, diet, sleep, sweat, energy, mood (emotion), as well as the tongue conditions and the palm conditions, etc. If you would want our expert to create a TCM diagnosis, you're welcome to contact us.