Healing in her world used to be done primarily with curative holy magic, but holy magic has been shorted due to a recent event so people have fallen back on less-effective homemade remedies such as potions, salves, etc. No antibiotics, hospitals, or advanced medicines. This character was trained as a magical healer, so she would be able to identify a wound going bad, but her knowledge of non-magical medicine is limited so she is ultimately unable to save herself.
Is it possible for a second-degree burn to not seem severe or large enough at first that someone could try to self-treat and conceal it for 1-3 days but then develop a fatal infection? Should I go for a puncture wound from a bite instead? If necessary I could additionally have her develop a pneumonia-type lung infection as a complication of smoke inhalation from the dragon’s breath, but I would rather not since that would be more obvious. It is a standard, somewhat small, fire-breathing dragon.
Researched: burn wound infection, burn wound sepsis, smoke inhalation injury, tags here relating to burns and septic shock.
Thanks for any help!