[my edge of my bottom lip that is next to the teeth have often in these past few months looked ulcerated like the lips in photo number 17 -- however, the edge of my lip where it meets my chin skin is NOT eroding, which IS happening to the patient of photo number 17.]
"In addition to the oral cavity proper,
squamous cell carcinomas also often develop
on the lip vermilion and the oropharynx.
Vermilion carcinomas show a striking
predilection for the lower lip, and usually occur
in light-skinned individuals with a long history
of actinic damage.
The lesion usually arises in
an actinic cheilosis, a premalignant condition
that is akin to actinic keratosis of the skin.
Actinic cheilosis is characterized by atrophy of
the vermilion border, which may develop dry,
scaly changes. As the condition progresses,
ulcerated sites may appear which partially heal,
only to recur at a later date (Figure 17). (The
patient often mistakes these recurring ulcerated
lesions for “fever blisters.”)
The evolving cancer slowly becomes a crusted, nontender, indurated ulcer or mass."
It is a common symptom (although it does NOT have to be present - not everyone who has actinic cheilitis has this particular symptom) of actinic cheilitis (the often-pre-cancerous type of cheilitis) that the border of your lower lip starts to kind of disappear, or to fade more into your facial skin, and not to have such a strongly demarcated lip outline. IF this is happening to your lips (the lip border is losing color/ seeming to fade into your chin skin) like in photo number 17 -- Go see a doctor.