What causes petechiae on both legs all of a sudden?

This is a rare disor: Could be benign hypergammaglobulinemia of waldenstrom. Or other problem with pltelets or blood proteins see a hematologist. Hypergammaglobulinemic purpura of waldenström: report of 3 cases with a short review. Malaviya an, kaushik p, budhiraja s, al-mutairi m, nampoory mr, hussein a, akanji ao. Source department of medicine, faculty of medicine, kuwait university, safat, kuwait. Anand@hsc.Ku.

Could be low plts: Individuals with itp or other causes of decreased platelets can develop small red dots on the dependent portions of their legs (also known as petechiae). See your physician to determine if low platelets are the problem and why they may be low.