Tinea versicolor is a chronic noninflammatory infection of the skin esp. of the trunk that is caused by a lipophilic fungus Pityrosporum orbiculare syn. Melassezia furfur and is marked by the formation of irregular macular patches, called also Pityriasis versicolor (Merriam-Webster’s Medical dictionary).
Lipophilic fungus has an affinity for lipids and fats. Our trunk is wrapped in layers of fat. Fat contains few blood vessels, only some capillaries near the skin. These capillaries feed the skin and the nerves.
There are two common causes of the feeling of pin pricks: (1) inflammation of the tip of a nerve ending as in a toothache; and (2) what is called a “raw nerve” that one feels at the heels, the inner thigh, on the mid to upper back, sometimes on the tip of the fingers, etc. This is due to the misfiring of the neurons. The specific cause of the misfiring of neurons as in epilepsy and such illnesses is unknown.
In tinea versicolor, the lipophilic fungus Pityrosporum orbiculare (Melassezia furfur) may have eaten into the fat and some nerve endings between the fat and the skin, causing inflammation of the nerve endings. Another possibility may be that the lipophilic fungus Pityrosporum orbiculare may have eaten away at the fat where a nerve ending is and has bitten into the nerve, causing a misfiring of the neurons in that area.