does sinus causes skin problem? I been to some beaches and end up with some mosquitoes bites on my arm and legs. It is very itchy.At first, it just like any other mosquitoes bites.But weeks went and it just stay there, and the amount of red spots keep on increasing. Then, i consulted a doctor in my hometown. He told me my skin problem is due to sinus. I took his medication for 2 months now.The red spots turned brown and the spots is not as watery as it is before after the 1 month of taking his medication.But there is no more improvement after that. Sometimes,The spots are very itchy and some still watery.I had consulted another doctor, he said sinus only affected face, others body part will not be affected. It is true?