How can I differentiate between primary and secondary dysmenorrhea? I get bad cramps 1 or 2 days of cycle but ALWAYS feel comfort with just 1 advil

Yours Primary Dysmen. Primary Dysmenorrhea is defined as cramping pain in lower abdomen occurring just before and during the menstruation in the absence of any disease.Secondary Dysmenorrhea is when the symptoms are caused by a disorder in woman's reproductive system such as Endometriosis,fibroid uterus,Adenomycosis or infection.Your case fits in the Primary Dysmenorrhea.