Senile purpurahttps://en.wikipedia.org/wiki/Solar_purpura
Senile purpura is a skin condition characterized by large, 1- to 5-cm, dark purplish-red ecchymoses appearing on the dorsa of the forearms and the hands. The purpuric lesion is caused by sun-induced damage to the connective tissue of the skin. No treatment is necessary. The lesions typically fade over a period of up to 3 weeks.

Treatment
It is important not to apply steroid ointments.

  • This condition is very common in older people and if the arm is held hard, it bruises easily. Steroid ointment should not be applied.