Patches of dry skin may be caused by environmental irritants like dry air or clothing friction. However, they can also be a symptom of health conditions like eczema or psoriasis. Dry skin patches may cause certain body areas to feel rough, scaly, and itchy.

Keratosis pilaris happens when your hair follicles are blocked with a build-up of keratin, a protein found in skin, hair and nails. It causes small, scaly bumps on the upper arms, thighs, and buttocks. The bumps can get worse in cold weather, and better in warm weather.

Pigmentation can appear due to different causes and contexts: post-pregnancy, sun exposure, clothing friction, hair removal, acne and inflammations, melasma... They result in spots or larger areas with a darker tone.