Granulosis rubra nasi is described as a benign, autosomal dominant familial disease of children involving the eccrine glands of the nose, cheeks, and chin. German dermatologist Josef Jadassohn first described the condition in 1901.  This condition appears to be extremely rare.
The term is sometimes used as a diagnostic title for hyperhidrosis of the nose. 
Pathogenesis is unknown. Granulosis rubra nasi is a nonneoplastic disorder of the eccrine glands, possibly representing a unique form of sweat retention.  Eccrine glands produce sweat, and an alteration in the rate of sweat secretion manifests as hypohidrosis or hyperhidrosis. A marked increase in sweat production on the nose occurs in granulosis rubra nasi. Hyperhidrosis also is present on the central face, palms, and soles. This hyperhidrosis appears to be responsible for the secondary changes of erythema and erythematous papules.
Granulosis rubra nasi is rare, and the precise frequency is unknown. Significant underreporting may be a factor.
No racial predilection has been described.
No sexual predilection has been described.
Granulosis rubra nasi usually starts in early childhood in patients aged 6 months to 10 years. Peak incidence is from age 7-12 years. Granulosis rubra nasi usually resolves spontaneously at puberty; however, it occasionally persists indefinitely, in which case telangiectasia becomes the predominant feature.