“…60 In vitro studies of cultures of normal human skin with lithium have demonstrated the direct role of lithium in epidermal hyperproliferation, leading to the modification of epidermal barrier function by the production of intercellular edema and vacuolar alteration with the formation of small cavities in the upper dermis. 61 Patients with a positive family history for psoriasis should be carefully evaluated for the potential Table 1 Classification of dermatologic manifestations of lithium therapy Inflammatory disorders [36][37][38][39][40][41][42]95,[127][128][129][130]144,146,148,156 Psoriasis and pustular psoriasiform eruption, erythema multiforme, exfoliative dermatitis, fixed drug eruption, maculopapular eruption, eczematous reaction, seborrheic dermatitis Disorders of sebaceous/apocrine glands 21,25,[99][100][101] Acne and acneiform eruption, hidradenitis suppurativa Disorders of the hair and nails 46,68,[77][78][79]92,93,97,98 Alopecia, folliculitis, onychomadesis, nail dystrophy, nail discoloration Mucosal lesions [102][103][104][105]107,109,143 Geographic tongue, lichenoid stomatitis, oral mucosal ulcerations, vaginal ulcerations Keratinization disorders…”