We　report　for　the　first　time　the　theoretical　and　experimental　research　on　Rydberg　electromagnetically　induced　transparency　and　second-order　fluorescence　dressing　evolution　by　Rabi　frequency　control　in　thermal　atomic　vapors,　in　which　the　controlled　results　are　well　explained　by　the　dressing　effect　and　the　Rydberg　excitation　blockade.　Based　on　the　certification　of　the　Rydberg　excitation　blockade　fraction　through　the　dependence　on　principle　quantum　number　n,　we　obtain　dressing　evolution　curves,　consisting　of　single-dressing　and　double-dressing　in　local　and　nonlocal　blockade　samples　by　scanning　the　probe　and　dressing　fields.　In　addition,　the　competition　between　the　Rydberg　dressing　second-order　fluorescence　and　fourth-order　fluorescence　is　first　investigated.　A　corresponding　theory　is　presented,　which　is　consistent　with　the　experimental　results.　Such　blockade　evolution　regularity　has　potential　applications　in　quantum　control,　and　the　Rydberg　dressing　may　be　useful　for　investigating　multiple-body　interactions,　as　well　as　for　inducing　short　range　interactions　in　Bose-Einstein　condensates.