Inclusion Criteria:

• Adult 18 years or over
• Have a stoma (colostomy, ileostomy or urostomy)
• Have healthy peristomal skin
• Have the ability to provide informed consent
• Are independently mobile
• Can stop using any stoma paste, cream, sprays or lotions on peristomal skin 1 day (24hrs) prior to the study appointment
• Are independent with stoma care management
• Are able to attend study appointment in Birmingham, UK

Exclusion Criteria:

• Have a current skin condition, such as eczema, psoriasis, or infection around the skin test site areas
• Have bleeding or broken peristomal skin
• Are currently taking any of the following medications: steroids, nicotine patches, acne medication (e.g., Accutane), any medication know to affect the properties of the skin
• Use patches on your abdomen, such as HRT patches
• Are receiving or have had radiotherapy or chemotherapy in the last 2 months
• Are taking or have had antibiotic treatment in the last 4 weeks
• Are currently receiving any stoma care treatment under a stoma care nurse specialist
• Have tattoos in the skin test site areas
• Are pregnant
• Have excessive hair on your abdomen
• Have participated in another skin testing study within the last 8 weeks