My gf is 26 years old, height-5'1" weight- 56. She is getting one or two red round patches on leg or hand. It doesn't sore or itching gradually it turns into brown and then black and faded away completely. It comes in 4-6 months. She had such symptoms 4-5 years back but stopped then. But now it is happening again for last one and half years with 4-6 month interval. She has low blood pressure, gum bleeding, low haemoglobin etc. Please give me comprehensive idea about the matter and advise me the necessary steps I should follow. I am very much worried. Please help.