Thank you for your query on Healthcare Magic.
Unexplained bruises in skin are due to bleeding into skin.
This type of spontaneous bleeding is seen in conditions with low blood platelet count
, bleeding disorders, and in scurvy
Investigations like complete blood picture, platelet count, bleeding time
, clotting time, and other coagulation profile has to be done to rule out such problems.
Therefore consult a physician for physical examination and investigations.
Hope I have answered your query.