https://blogs.mercola.com:443/sites/vitalvotes/archive/2026/05/20/why-your-skin-suddenly-feels-itchy-in-the-heat.aspxRed, itchy bumps that suddenly appear during hot weather are often dismissed as simple irritation, but heat rash may actually be a sign that your skin’s natural cooling system is becoming overwhelmed. Also known as prickly heat, the condition developsenCommunityServer 2008.5 SP1 (Debug Build: 31106.3070)