Know your body profile
Make it a habit to check your body profile (the shape of the area beneath and around your stoma) every time you change your appliance. It might help to use a mirror. Knowing which body profile you have is key to monitoring change. There are three types of body profile:

Regular
The area around the stoma is more or less level with the abdomen, although your skin surface may be uneven.
Inward
The area around the stoma sinks into the abdomen, creating a dip.
Outward
The area around the stoma rises from the abdomen creating a peak.
Try the BodyCheck!
It's a good idea to occasionally use the online BodyCheck tool to see if your appliance is still the right match for your body profile. It’s quick and easy.