Prolonged use of topical steroids causes
**Core Concept**
Prolonged use of topical steroids leads to a condition known as **steroid-induced rosacea-like dermatitis**, characterized by telangiectasia, perioral dermatitis, and atrophy of the skin. This condition is a result of the vasoconstrictive and anti-inflammatory effects of topical steroids, which can lead to skin atrophy and telangiectasia.
**Why the Correct Answer is Right**
The correct answer is related to the **vasoconstrictive effects** of topical steroids. When applied topically, steroids cause vasoconstriction, which can lead to the formation of telangiectasia and atrophy of the skin. Prolonged use of topical steroids can also lead to **skin atrophy**, characterized by thinning of the skin, loss of elasticity, and easy bruising. This is due to the suppression of collagen synthesis and the degradation of existing collagen.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not accurately describe the effects of prolonged use of topical steroids. While **allergic contact dermatitis** can be caused by various substances, it is not a direct result of prolonged use of topical steroids.
**Option B:** This option is incorrect because **acne** is not a direct result of prolonged use of topical steroids. While topical steroids can cause skin atrophy and telangiectasia, they do not typically cause acne.
**Option C:** This option is incorrect because **lichen simplex chronicus** is a skin condition characterized by thickening of the skin due to chronic rubbing or scratching, not a direct result of prolonged use of topical steroids.
**Clinical Pearl / High-Yield Fact**
Remember that topical steroids can cause **rebound phenomenon**, where the skin becomes dependent on the steroid to reduce inflammation, and withdrawal of the steroid can lead to worsening of symptoms.
**Correct Answer: C. Lichen simplex chronicus.**