It is caused due to physical trauma, such as a violent coughing fit, prolonged vomiting, or excessive crying.
Causes. Tiny blood vessels (capillaries) link the smallest parts of your arteries to the smallest parts of your veins. Petechiae appear when capillaries bleed, leaking blood into the skin. A number of things can cause this bleeding, including: 1  Prolonged straining. 2  Certain medical conditions. 3  Specific types of injuries. 4  Medications. 5  Injuries and sunburn Petechiae result from tiny areas of superficial bleeding into the skin. They appear as round, pinpoint-sized dots that are not raised. The color varies from red to blue or purple as they age and gradually disappear. Petechiae commonly appear on the lower legs, but may be distributed all over the body.  Petechiae are small red or purple dots of blood that appear on the skin or in the mucus membranes. The mouth is one mucus membrane where petechiae may occur. Petechiae occur when superficial blood vessels under the skin break. Petechiae may look like a rash. The most common cause of petechiae is through physical trauma, such as a violent coughing fit, prolonged vomiting, or excessive crying. This kind of trauma can result in facial petechiae, particularly around the eyes. Petechiae may also appear in aging skin. Definition. Petechiae are pinpoint-sized red dots under the surface of the skin. The dots are red because they contain blood that has leaked from tiny blood vessels (capillaries) into the skin. Petechiae may be an indication of a serious underlying problem that requires medical evaluation. Petechiae: Pinpoint flat round red spots under the skin surface caused by intradermal hemorrhage (bleeding into the skin). Petechiae are red because they contain red blood that has leaked from the capillaries into the skin.  A petechia, plural petechiae, is a small (1–2 mm) red or purple spot on the skin, caused by a minor bleed (from broken capillary blood vessels). Petechia refers to one of the three descriptive types of bleeding into the skin differentiated by size, the other two being purpura and ecchymosis. Petechiae are by definition less than 3 mm. Petechiae. Petechiae are pinpoint, round spots that appear on the skin as a result of bleeding. The bleeding causes the petechiae to appear red, brown or purple. Petechiae (puh-TEE-kee-ee) commonly appear in clusters and may look like a rash. Usually flat to the touch, petechiae don't lose color when you press on them. Petechia is actually a spot on your skin that may be red to purple in color. Petechiae is the plural form when there are groups of spots appearing on the skin. These are results of minor hemorrhage. They may appear like a rash and usually emerge in clusters. Petechiae is a sign of a disease related to low platelet count (thrombocytopenia). It can also occur if extreme pressure is applied to the tissues such as in excessive vomiting, tourniquet application or in too much coughing. Petechiae can occur among the children and the most common cause for them is viral infection.
http://www.mayoclinic.org/symptoms/petechiae/basics/causes/SYM-20050724 http://www.medicineonline.com/articles/p/2/Petechiae.html http://www.healthgrades.com/symptoms/petechiae http://www.medicalsymptomsguide.com/what-causes-petechiae.html http://www.medicinenet.com/script/main/art.asp?articlekey=4853 https://en.wikipedia.org/wiki/Petechia http://www.mayoclinic.org/symptoms/petechiae/basics/definition/SYM-20050724 http://healthfixit.com/petechiae-petechia-pictures-causes-diagnosis-treatment/
what causes petechiae