Harmful causes! If you regularly use medications with concentrated steroids contents, whether it is pills, injections or creams, this increases the risk of dermal stretch marks since steroids damages the skin’s connective tissue and destroys dermal collagens, which reduces skin elasticity and decreases the skin’s ability to stretch. Stretch marks typically appear as bands of parallel lines on your skin. These lines are of a different color and texture than your normal skin, and they range from bright pink to red to purple. Stopping taking steroids can’t stop stretch marks from occurring in some cases.