Hard spot

Localized scleroderma, also known as scleroderma, is a type of skin disease with localized swelling of the skin and gradual sclerosis. Occurs on the scalp, forehead, waist and abdomen, and limbs. The initial lesions are pale red in size and slightly edematous, with single or multiple lesions. Later it gradually hardened to be pale yellow or yellowish white. The surface is smooth and shiny like waxy, the center is slightly concave, the hair at the skin is shed, sweating is reduced, the surrounding capillaries are dilated, and the color is purple or darkened. Advanced skin atrophy and hypopigmentation. Skin lesions vary in shape, and are classified into four types: patchy, banded, drip-shaped, and generalized. Among them, patchy is the most common. The disease generally has no conscious symptoms, some may show mild itching or tingling sensation, gradually become dull, no obvious systemic symptoms, and limited scleroderma generally does not invade the internal organs.