need to check your bleeding profile and RA factor
Thanks for writing to HCM.
Frankly speaking, i am not sure of what is the exact cause of it. But this can be due to insect bite or a ruptured bood vessel.
I would suggest that you get your complete coagulation profile done, to rule out any coagulation disorder. Also sinus
type headache may suggest that there could be a bleeding episode in your sinus also. A ct scan
of your head and a CT angiogram (if it contains blood) will be needed to help identify the cause.
Spontaneous bleeding due to ruptured blood vessel are usually seen inside the head. It can also be seen outside head, that too without any trauma, generally in rheumatoid arthritis
. So you need to get tested for that too, by getting levels of RA factor and anti-CCP done.
Hope I have been helpful.
Dr. Ashish Verma