Washington: Modern tattoo inks are causing increased complications like allergic reactions, serious infections and reactions that can mimic skin cancer, a dermatologist has claimed.Tattoo ink`s composition has changed dramatically over the years. In the past, metal salts, lead, cobalt and carbon were used in inks but today, many modern tattoo inks (especially intense reds and yellows) contain organic azo dyes with plastic-based pigments, which also have industrial uses in printing, textiles and car paint.As a result, Michi Shinohara, MD, FAAD, a board-certified dermatologist and clinical assistant professor of dermatology at the University of Washington in Seattle, explained that there are many unknowns about how these inks interact with the skin and within the body and if they are responsible for an increasing number of complications.One of the most common problems associated with tattooing is allergic reactions to the tattoo pigments. Itching, bumps or rashes can occur days, months or even years after the initial tattoo.In people suffering with psoriasis and eczema, tattoos may cause the chronic skin conditions to flare.Sarcoidosis is an autoimmune disorder that is characterized by swelling and itching, which can occur in a tattoo decades after the procedure and can involve other organs, like lungs or eyes.This type of reaction is not directly caused by the original tattoo, but can show up within the tattoo.According to Shinohara, Skin cancer can occur within a tattoo, and for that reason tattoo artists need to be careful not to place a tattoo over an existing mole.However, one reaction that can result is a bump that mimics skin cancer, which can ruin the tattoo.This type of bump or lesion, which can occur within a tattoo looks like a type of skin cancer known as squamous cell carcinoma.Since the bump is so hard to distinguish from this skin cancer, it requires a biopsy and, in some cases, may need to be treated as a skin cancer, with additional surgery.Common infections linked to tattooing include localized bacterial infections.
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