Impetigo Guttate psoriasis Other viral skin infections Contact dermatitis Stevens-Johnson syndrome (usually the clinical picture is obvious) Shingles, or herpes zoster, is
[patient.info]
[…] of skin ischemia and no discharge or pustules developed till these lesions became blackish, dry and thick.
[web.archive.org]
These include the extracranial arteries, middle meningeal artery, large veins, venous sinuses, cranial and spinal nerves, head and neck muscles, the meninges, falx cerebri
[en.wikipedia.org]