The purpose of this study is to characterize the cell (the basic building block of all living things) populations and inflammatory (pain and swelling) mediator responses in suction skin blister fluid after allergic skin reaction (ASR) [rash] induction with D. Pteronyssinus [house dust mite (HDM)], Alternaria alternata, or Aspergillus fumigatus allergens in participants with atopic dermatitis (AD) [Skin rash, Eczema] or allergic asthma (AA) [breathing disorder in which there is a wheezing and difficulty breathing].