My grandmother keeps getting these massive purple blood patches on her forearms from barely bumping into things. It looks alarming and the nurse hotline has a three hour wait. Is this dangerous?

Senile purpura, also known as actinic purpura, is a common condition in older adults. It is characterized by the development of large, purple bruises and is primarily caused by the thinning of the skin and the loss of the subcutaneous fat layer that cushions blood vessels. As a person ages, the skin loses collagen and becomes more fragile, while blood vessels become more susceptible to damage.

This condition is most often seen in people over the age of 50 and is more prevalent in those with a history of sun exposure or those taking certain medications that affect blood clotting. Senile purpura is generally considered harmless, although it can be unsightly and may cause concern for those unfamiliar with the condition.