Pin-head to pea-sized, circumscribed epidermal elevations, containing serous fluid; as, for example, the so-called fever-blisters, the lesions of herpes zoster, and of vesicular eczema.
What are blebs (bullæ)?
Rounded or irregularly-shaped, pea to egg-sized epidermic elevations, with fluid contents; in short, they are essentially the same as vesicles and pustules except as to size; as, for example, the blebs of pemphigus, rhus poisoning, and syphilis.
What are pustules (pustulæ)?
Circumscribed epidermic elevations containing pus; as, for example, the pustules of acne, of impetigo, and of sycosis.
Secondary Lesions.
What are secondary lesions?
Those lesions resulting from accidental or natural change, modification or termination of the primary lesions.
Enumerate the secondary lesions.
Scales, crusts, excoriations, fissures, ulcers, scars and stains.