What causes cracked, scaly skin resembling fish scales from the ankle to the lower leg, and how should it be managed?

In general, cracked skin on the ankle to lower leg area resembling fish scales may be caused by factors such as dry skin, Sjögren's syndrome, seborrheic dermatitis, tinea corporis (body ringworm), or psoriasis. Treatment can be carried out through general care or medication. Specific details are as follows:

1. Dry Skin

In cold weather, moisture in the air is removed by cold winds, often causing the skin to feel tight, dry, or even peel. It is important to drink plenty of water and promptly replenish the body's hydration.

2. Sjögren's Syndrome

This condition may be related to abnormal genetic factors and autoimmune responses. Lymphocytic proliferation and infiltration may occur in affected tissues, leading to dry skin and flaking. Under a doctor's guidance, medications such as prednisolone acetate tablets or celecoxib capsules may be used for treatment.

3. Seborrheic Dermatitis

Associated with increased sebaceous gland secretion, impaired skin immune barrier, and individual immune responses, this condition causes skin capillary dilation and the aforementioned symptoms. Under medical supervision, treatments may include clobetasol propionate cream or vitamin B2 tablets.

4. Tinea Corporis (Body Ringworm)

Tinea corporis is a fungal skin infection typically caused by fungi infecting the skin surface. When fungi invade the skin, they may damage the stratum corneum, resulting in scaling, wrinkling, and fish-scale-like changes. Under a doctor’s direction, antifungal medications such as amorolfine hydrochloride cream or luliconazole cream may be used.

5. Psoriasis

Psoriasis is an immune-mediated disorder characterized by abnormal proliferation of skin cells, commonly presenting as red plaques covered with silvery-white scales. Patients may use calcipotriol ointment or tacalcitol ointment under medical guidance.

If any skin abnormalities occur, it is recommended to seek timely medical attention to prevent adverse effects.