Petechiae: Understanding the Tiny Spots of Bleeding Under the Skin
In the realm of skin conditions, petechiae and purpura share many similarities. Both are characterized by minuscule spots of bleeding beneath the skin’s surface. However, petechiae differ in size, measuring less than 4 mm in width. These flat spots are typically not painful or itchy, although they can sometimes be mistaken for a rash.
One distinguishing feature that sets petechiae apart from rashes is their reaction to pressure. When pressure is applied to a rash, it tends to turn pale. On the other hand, petechiae do not change color when pressure is exerted on them.
Low platelet count or certain medications are known to cause the development of petechiae. Additionally, severe conditions such as endocarditis, infection, and leukemia can also contribute to the appearance of these tiny bleeding spots under the skin.
Understanding Senile Purpura
Senile purpura is a bruising condition that is commonly observed in older individuals due to age-related changes in their skin tissue and fragile blood vessels. The primary cause of this type of bruise is the reduced density of the skin tissue, which makes the blood vessels more prone to damage.
Senile purpura manifests as dark purple areas on the hands and forearms of affected individuals. These bruises can appear spontaneously without any apparent cause. Although they typically heal within a week, they often leave behind a brownish discoloration that may become permanent.