There are many causes for a bruise to appear; like
certain medications which interfere with the clotting mechanism like aspirin, warfarin etc,
Idiopathic thrombocytopenic purpura
Liver disorders like cirrhosis etc. In your case, history of trauma , drug intake is ruled out.
Any history of fever , night sweats
or unexplained weight loss?
Any history of bleeding disorders in the family?
Any history of thyroid disorders?
I would suggest you visit your physician and get yourself examined and investigated. Investigations like CBC (complete blood count
),Hemoglobin, RBC, WBC,TC, DC, ESR, PLATELET count
, BLEEDING TIME
, CLOTTING TIME, PROTHROMBIN TIME(PT/INR), LIVER FUNCTION TEST.
At this point I don't think the bruise, sorethroat and blocked nose are related. I think after the investigation results, we might be able to come to a diagnosis. For the blocked nose and sorethroat, you could try warm saline gargles, drink plenty of warm water, Steam inhalation.
Hope this helps. Get well soon :)