It may be seen in the form of extensive eruptions on the skin of the individuals who otherwise enjoy the most robust health in general , and on the contrary it may appear only during periods of temporarily debility, as in women during pregnancy and lactation.
First manifestation is Small Red Papules, soon decked with a White Scale.
They may appear as few and scattered, or many and closely aggregated.
The scaly papules increase at their periphery, becoming flattened patches from the size of a pea to that of a coin or even larger.
When the progress of the disease continues, neighbouring patches encroach on each other, and in time coalesce, giving rise to irregular gyrate forms.
Coincident with the peripheral extension there is an increase in the infiltration or thickening of the skin, and the scales become large, imbricated , and more or less adherent.
On forcible removal of the scales, a red infiltrated patch is brought to light, on the surface of which minute Droplets of Blood may be seen.
Itching
Greater portion of the surface ,may undergo a gradual involution and disappear on the attainment of the disease to its maximum development .
Plaque psoriasis
Flexural psoriasis
Pustular Psoriasis and Nail involvement.