Chemicals that may cause allergy are being used in structure nails. In this case report two structure nail makers are described, who were diagnosed with occupational asthma in clinical studies. The studies included an inhalational exposure simulating the work. The causative agents of occupational asthma are apparently the acrylate compounds contained in the chemicals; use of these compounds has previously been linked with allergic contact dermatitis and asthma. Since the making of structure nails involves health risks, such work requires appropriate premises and personal protection.