Atopic Dermatitis is a rosacea mimic. It looks like rosacea but isn't.
Doctors have to make a differential diagnosis to distinguish atopic
dermatitis from rosacea (or vice versa).

A bamboo charcoal by-product used as a folk remedy for Atopic Dermatitis
Here is the report:

Evaluation of carcinogenic/co-carcinogenic activity of chikusaku-eki,
a bamboo charcoal by-product used as a folk remedy, in BALB/c 3T3 cells.
Kimura Y, Suto S, Tatsuka M.
Biol Pharm Bull. 2002 Aug;25(8):1026-9.

Chikusaku-eki is an acidic dark brown liquid obtained as a by-product from
bamboo charcoal burners. The solution diluted with water is gaining widespread
popularity in Japan as a folk medicine for skin diseases such as scabies,
eczema,
and atopic dermatitis.

link:
http://www.ncbi.nlm.nih.gov/sites/entrez?
Db=pubmed&Cmd=ShowDetailView&TermToSearch=12186403&ordinalpos=1&itool=Entr
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ystem2.PEntrez.Pubmed.Pubmed_ResultsPanel.Pubmed_RVDocSum