Common visible pattern
The temple corners may deepen first, leaving a more prominent center. Some patterns advance evenly; others are visibly asymmetric. The Norwood scale is one way to describe common shapes, not a diagnosis. [source]
Why recession happens
Hereditary male-pattern hair loss is one common cause, but inflammation, traction and other conditions can also affect the front hairline. Symptoms and history matter. [source]
What to record
Save front, left-temple and right-temple views. Note haircut timing, hair product and whether the hair is wet or dry. Compare the outline and density immediately behind it.
Sources
- Male pattern baldness: classification and incidence. Southern Medical Journal, 1975.
- Hair loss: Who gets and causes. American Academy of Dermatology, 2024.
- A practical guide to the standardization of hair loss photography for clinicians. Clinical and Experimental Dermatology, 2024.