Infection that causes the buildup of toxin in the blood or tissues (sepsis).A bleeding... Read More 5.9k views Reviewed >2 years ago Thank Dr. Kenny Chuu agrees 3 thanks Petechiae Scratching From [F6Q9DA] Petechiae can be symptomatic of some bacterial or viral infections. If you notice that your bowel movements contain hard stools, it may be caused by dehydration, not eating enough fiber, lack of exercise, or sign of Irritable Bowel Syndrome (IBS). Petechiae, When to Worry: Causes, Symptoms, and More Typically, straining will cause the dots to appear on the upper area of your body including the neck and shoulders. 5 Reasons You May Have Petechiae These marks usually disappear within 30 … Can scrubbing the skin hard cause petechiae? I scratch my leg and within seconds get petechiae, should I … 4y Yes, especially certain areas where the skin is thinner/more sensitive. These spots tend to be irregular in shape (ranging from a dark maroon to a purple), and can be seen on the skin or in the mucus membranes. It is sometimes a sign of certain diseases. Straining One of the more basic reasons you will have petechiae appear on your skin is due to straining. normal blood tests. Damage to the skin, such as from blunt force (for example, a car accident), biting, or hitting can cause petechiae to form. Injury: Damage to the skin can cause petechiae. Examples include a car accident, bite, friction on the skin or even sunburn. Leukemia: Leukemia is cancer in the blood and bone marrow. Other signs of this disease may include weight loss, swollen glands, easy bleeding or bruising, nosebleeds and night sweats. Chemotherapy Drugs. I noticed them on my arms when I'd scratch even a small itch, I'd end up w/ red lines that stayed for hours, sometimes days! Many different things … noticed 2-3 weeks ago that my skin was itchy & after scratching petechiae appeared.