Erythermalgia Involving the Face Alone: Two Case Reports.

Erythermalgia is a rare cutaneous disease characterized by episodic attacks of burning pain, erythema, and increased temperature. It primarily involves the extremities, with possible extensions to the ears, face, neck, and scrotum; in rare instances, it may afflict the ears, face, or the scrotum alone. Although various medications alone or in different combinations have been tried with significant variations in response, no recommended therapeutics have been established until very recently.

Intradermal Growing Hair: Two Case Reports.

Hair growing inside the skin and burrowing in the uppermost dermis, previously termed as "ingrowing hair," is a rarely reported cutaneous disorder. Up to July 31, 2018, only five cases have been reported, all were male. The authors report two Chinese Han men, 26-year-old and 31-year-old respectively, presenting with progressive extending black lines inside the skin on the right mandibular angle and the neck respectively.

Cutaneous pili migrans: a case report and review of the literature.

Background: Cutaneous pili migrans is a rare condition in which the hair shaft penetrates the superficial layer of the skin and produces a creeping eruption mimicking the lesion of cutaneous larva migrans.

Methods: We report a 28-year-old Chinese man who presented with a painful and slow-moving black, linear eruption on the left sole after walking on a waterlogged street wearing slippers without socks.

Results: The lesion started at the anterior part of the foot near the external border, extending linearly along Langer's line towards the lateral side.