 [ Symptoms ] metal splinter in eye must i go to er now or can i wait until morning to see my doctor to be removed [ Disease ] hi petechial subcutaneous infections can be caused by clotting factor derangements or other hematological conditions deficiencies of vitamin k and c also can cause this several autoimmune diseases and viral infections also can cause petechiae rarely these can be due to side effect of some medicine that you are already taking thank you