 [ Symptoms ] i have petechiae spontaniously appearing on my thighs and calves need second medical opinion [ Disease ] well petechies and bruising of the skin of thighs can be due to a number of causes like deficiency of clotting factors thrombocytopenia von willebrands disease etc consult a hematologist and get evaluated and a thorough clinical evaluation and investigation like bleeding and clotting time anti platelet antibody levels vitamin k clotting factors etc all needs to be checked treatment can be done accordingly hope this helps regards