In his description of the symptoms of pregnancy, Hippocrates men- tions. ![]() The mainstay of treatment remains topical depigmenting agents. morning sickness, pica, and the diet for optimal fetal development. Quick fixes with destructive modalities (eg, cryotherapy, medium-depth chemical peels, lasers) yield unpredictable results and are associated with a number of potential adverse effects. Sunscreens containing physical blockers, such as titanium dioxide and zinc oxide, are preferred over chemical blockers because of their broader protection. Prudent measures to avoid sun exposure include hats and other forms of shade combined with the application of a broad-spectrum sunscreen at least daily. ![]() Therefore, it is worthwhile to prevent the onset of chloasma, by strict photoprotection. While it is also associated with nutrition al deficiencies, pica can occur when there are no deficiencies. The condition is self-limited however spontaneous resolution is time-consuming and may take months to resolve normal pigmentation. Pica strikes all races and socioeconomic groups, however, there are cultural tendencies towards this disorder. UV-B, UV-A, and visible light are all capable of stimulating melanogenesis. The observation that postmenopausal woman who are given progesterone develop melasma, while those who are given only estrogen do not, implicates progesterone as playing a critical role in the development of melasma. In addition, the occurrence of melasma with estrogen- and progesterone-containing oral contraceptive pills has been reported. However, nulliparous patients with chloasma have no increased levels of estrogen or MSH. Estrogen, progesterone, and melanocyte-stimulating hormone (MSH) levels are normally increased during the third trimester of pregnancy. The exact mechanism by which pregnancy affects the process of melanogenesis is unknown. It is classified as an eating disorder but can also be the result of an existing mental disorder. The most common locations are the cheeks, the upper lip, the chin and the forehead. Pica is the eating or craving of things that are not food. It presents as symmetric hyperpigmented macules, which can confluent or punctuate. Chloasma is a required hypermelanosis of sun-exposed areas occurred during pregnancy and it can affect 50-70% of pregnant women.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |