Bowen's Disease

Bowen’s disease is a rare skin growth, which is confined to the outer layer of the skin. It usually appears as a slow-growing red and scaly patch. Occasionally Bowen’s disease can become cancerous.

The patch may be:

• red or pink
• scaly or crusty
• flat or raised
• up to a few centimetres across
• itchy (but not all the time)

The patch can appear anywhere on the skin, but is especially common on exposed areas like the lower legs, neck and head.

Sometimes they can affect the groin area and, in men, the penis.

If the patch bleeds, starts to turn into an open sore (ulcer) or develops a lump, it could be a sign it's turned into squamous cell skin cancer.

It's important to get a proper diagnosis, as Bowen's disease can look like other conditions, such as  psoriasis or eczema.

Source: NHS

https://www.nhs.uk/conditions/bowens-disease/