Allergic contact dermatitis due to guava tea

Allergic contact dermatitis to substitute hair dyes in a patient allergic to para‐phenylenediamine: Pure henna, black tea and indigo powder

“…Obi et al described a case of ACD from tannins in guava tea. 13 Tannins have also been reported to cause ACD in 2 patients with perianal eczema applying a topical haemorrhoidal cream containing tannin 14 and in a patient with hand eczema who applied synthetic tannin (Tannosynt liquid). 15 The allergens in tannins have not been clearly defined: we considered both tannic acid and gallic acid but testing to these agents was negative in our case.…”