Discover the 6 most common causes of mouth rashes in children beyond food allergies, from acidic foods to infections, and ...

Hives, or urticaria, causes welts on the skin ... According to Seattle Children’s, viral infections are the most common cause of widespread hives, or a hives rash that affects more than one ...

HSP usually affects children between the ages of two and 10 ... Symptoms include a skin rash which looks like small bruises or small reddish-purple spots, usually on the bottom, legs and elbows.