Basically, at least based on what my gynecologist told me PMDd is diagnosed when symptoms you may experience with PMS are so severe they impact your ability to function. For example it might be normal to get a little more depressed before periods but I get suicidal urges which is not

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Pms refers to pre menstrual syndrome, while PMDD refers to pre menstrual dysphoric disorder. Basically pmdd is when you have really severe pms symptoms that become debilitating

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