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Schizophrenia is a severe mental illness that can affect your ability to think clearly, manage your emotions, and interact with

Scheuermann's disease is a condition in which some of the bones of the spine (vertebrae) develop wedge-shaped deformities. This

The sacrum is a large triangular bone at the bottom of the spine. It is inserted like a wedge between the two hipbones. The sacrum

Sarcoidosis is a rare disease that causes inflammation and scar tissue throughout the body, especially the lungs, lymph nodes

Nonprescription saline nasal sprays and nose drops are used to keep nasal tissues moist, relieve nasal irritation, and help thick

A secondary infection is a bacterial or viral illness that develops following a first illness. The second infection may develop

A second opinion is an evaluation by a doctor after a person has already been examined, diagnosed, or treated by another doctor. A

Second-degree burns are injuries to the skin caused by heat, radiation, electricity, chemicals, or friction. These burns are also

Seborrheic keratoses are common noncancerous (benign) skin growths that men and women develop as they age. They may appear as one

Seborrheic dermatitis is a skin condition that causes a rash with greasy, flaky skin patches. It often occurs on the scalp and