What is the diagnosis for lips with pinkish erosions that heal with scars?

Major aphthae, also known as major aphthous ulcers or Sutton’s disease, is characterized by painful, deep ulcers that can lead to erosions in the mouth, including the lips. These ulcers typically present as large, round or oval lesions with a gray or whitish necrotic center surrounded by a red halo. The erosions caused by major aphthae can heal with scarring, which aligns with the clinical presentation described in the question.

While other conditions may present with erosions or ulcers, the specific characteristic of healing with notable scarring is more strongly associated with major aphthae. Herpes tends to cause recurring vesicular lesions that crust over but do not typically heal with scars. Traumatic ulcers are usually localized to areas of trauma and may not exhibit the characteristic scarring or pinkish appearance associated with major aphthae. Angular cheilitis usually presents as cracking and inflammation at the corners of the mouth rather than erosive lesions on the lips themselves.

Thus, the specific attributes of the erosions and the scarring upon healing align most closely with a diagnosis of major aphthae, making it the correct choice.