Ulcer
https://en.wikipedia.org/wiki/Ulcer
☆ In the 2022 Stiftung Warentest results from Germany, consumer satisfaction with ModelDerm was only slightly lower than with paid telemedicine consultations. 

Aphthous ulcer

Ulcer with a thick crust
relevance score : -100.0%
References
Pressure Ulcer 31971747 NIH
Pressure injuries, also termed bedsores, decubitus ulcers, or pressure ulcers, are localized skin and soft tissue injuries that form as a result of prolonged pressure and shear, usually exerted over bony prominences. These ulcers are present 70% of the time at the sacrum, ischial tuberosity, and greater trochanter. However, they can also occur in the occiput, scapula, elbow, heel, lateral malleolus, shoulder, and ear.
○ Treatment ― OTC Drugs
Ulcers that persist without an obvious cause may represent skin cancer (squamous cell carcinoma).
Clean and dress the wound.
Initially, Betadine works by releasing iodine, which kills various microorganisms. However, continued use of Betadine may interfere with wound healing.
Apply antibiotic ointment daily and cover the wound with a hydrocolloid dressing to prevent further infection.
#Hydrocolloid dressing [Duoderm]
#Polysporin
#Bacitracin
#Betadine