Guttate psoriasishttps://en.wikipedia.org/wiki/Guttate_psoriasis
Guttate psoriasis is a type of psoriasis that presents as small (0.5–1.5 cm in diameter) lesions over the upper trunk and proximal extremities; it is found frequently in young adults. The term "guttate" is used to describe the drop-like appearance of skin lesions. Guttate psoriasis is classically triggered by a bacterial infection, usually an upper respiratory tract infection.:

The number of lesions can range from 5 to over 100. Generally the parts of the body most affected are seen on the arms, legs, back and torso.

The treatments used for psoriasis can also be used for guttate psoriasis. The condition often clears up on its own within weeks to months, and only about one third of patients will develop chronic psoriasis.

Treatment ― OTC Drugs
It often disappears spontaneously over time. It may take about 1 month.
#OTC steroid ointment

Treatment
#Phototherapy
  • Lesions on the back torso. A large number of small, scaly macules or patches occur on the trunk after symptoms of a common cold. Because it improves when exposed to sunlight, it mainly occurs on the trunk