question: Hi , I am a 24 yrs old man . My blood group is O +ve and I am apparantely healthy . I voluntarily donated blood on friday morning . On saturday morning , I found a big patch of black and blue colour near the punctured area . I consulted the medico who carried out the procedure , she said it will go in 3-4 days . Now its monday morning and still there is no improvement . I am really scared .Is this something very serious . Please help me. Thanks , Suprotim Roy