• Anna Solana, science journalist

    Careful with henna tattoos!

    15 Jul Careful with henna tattoos!




    Getting a henna tattoo is an engaging experience for adults and children in the summer. After all, it is just for a few days. But you may end up regretting it. Tattoos made with black henna, whose decorative motifs may even include glitter, can trigger severe allergic skin reactions and permanent sensitization.


    Henna is traditionally used in North Africa and other parts of Asia as a hair dye and in religious and ritual tattoos. This natural henna is dark green to brown in colour and lasts three or four days at most. But black henna can draw on the skin in a way more like the ink used in permanent tattoos because, as the name suggests, it is darker in colour. Its success on beaches, especially among children, is explained by the fact that it lasts longer and is easier to apply. To achieve this effect, various colours are added to the natural henna – which is where the problem lies, as they include paraphenylenediamine (PPD). Read More

  • Violeta Camarasa, science journalist

    10 tips for healthy, strong and beautiful nails

    10 Jul 10 tips for healthy, strong and beautiful nails




    Our fingernails play a key protective role and are also aesthetically important. They protect our fingertips – our main source of tactile information – and enable us to grasp and manipulate all sorts of objects. They are also a window to general health problems. These tips will help you keep your nails healthy and beautiful.


    1. Keep nails always clean and dry. Nails can easily become an ideal home for bacteria and fungi. For this reason, you should keep them clean, avoid leaving your hands too long in water and wear rubber gloves when cleaning or when handling chemicals.


    2. Don’t abuse your nails. Nails, like hair, are made of keratin and are an integral part of the skin. They are constantly in touch with the environment and easily damaged. When you use them as a tool to scratch things or manipulate objects, do so carefully. And when you decorate them, learn the facts about the risks associated with different techniques. Read More

  • Rosa Taberner, dermatologist

    Psoriasis is not contagious

    30 Jun Psoriasis is not contagious



    Medicine Net

    Acción Psoriasis

    Psoriasis is a chronic condition which predominantly affects the skin and develops in about 2% of the population. Its psychological impact is great as it sometimes leads to social rejection, mainly due to other people’s ignorance of the disorder.


    Psoriasis is a chronic inflammatory disorder that affects the skin, nails and sometimes the joints. Around 2% of the population is affected. Psoriasis is caused by defective activation of a type of blood cell (T lymphocyte) that normally takes care of the defence system. The skin cells renewal process – which normally takes 28-30 days – speeds up to 3-4 days for psoriatic lesions. The excess cells accumulate on the skin surface and produce the characteristic appearance of red, raised lesions with whiteish flakes. Read More

  • Susana Andújar, chemist

    Allergens in cosmetic products

    We have known of skin allergic reactions associated with cosmetic products for many years. And each year, hundreds of studies add further information about the safety of ingredients. As a result, new regulations and limitations on use are constantly emerging. Which ingredients are the most allergenic?


    Health authorities have published numerous lists of ingredients whose allergenic potential is known. But as well as considering an ingredient’s facility for eliciting an immune reaction, we also need to consider its frequency of contact with the skin and mucous membranes. Both these factors – allergenic potential and application frequency – are the triggers for most cases of undesirable reactions produced by the use of cosmetic products. Read More