The claim that dry, rough elbows are a sign of a serious condition is exaggerated. Dry skin on the elbows is a common problem and usually harmless. The skin on the elbows is naturally thicker and has fewer oil glands, making it more prone to dryness.

However, there are cases where dry, rough, or discolored skin on the elbows can be a sign of a medical problem. In these cases, it is a good idea to consult a doctor.

Common and Harmless Causes
Dry Skin: The most common cause is simply dry skin. The skin on the elbows is often neglected and is exposed to constant friction from clothing and exercise.
Lack of hydration: Washing with hot water and using harsh soaps can strip your skin of its natural oils.
Allergies: Certain fabrics or detergents can cause an allergic reaction that leads to rough elbows.
Potential serious causes
In rare cases, dry elbows can indicate a medical problem.

Psoriasis: An autoimmune disease characterized by red, scaly patches on the skin, often on the elbows.
Eczema: An inflammatory skin condition that causes dry, itchy, and red skin.
Hyperthyroidism: An underactive thyroid can cause very dry skin all over your body, including your elbows.
Diabetes: Diabetes can lead to skin problems like dry skin and itching.

If you notice that the dryness on your elbows doesn’t respond to moisturizers, or if you experience other symptoms like swelling, redness, or itching, you should consult your doctor.