Elastoderm is a cream meant for stretch marks related pregnancy. It contains Aqua and Allium cepa. It is a dermatological medicine. Stretch marks are one of the most common skin complaints among women. The marks may be the result of maternity, a growth spurt, obesity, or simply packing on too much bulk too quickly at the gym. It s common to see them on the stomach area, thighs, or even the upper arms. Stretch marks can also appear on breast tissue and the buttocks in some cases.