Health Conditions Starting With O — Research & Medical Insights

Excess body fat associated with increased risk of many chronic diseases.

Degenerative joint disease from cartilage breakdown, most common in knees and hips.

Reduced bone density and strength increasing fracture risk, especially in older women.

Cancer of the ovaries — often diagnosed late due to non-specific early symptoms.

A disorder with unwanted thoughts and repetitive behaviors that interfere with life.

Repeated episodes of breathing interruption during sleep from airway collapse.

Elevated eye pressure that can lead to glaucoma if untreated.

A rare cancer arising in the pigment cells of the eye.

A brain tumor arising from oligodendrocytes, usually slow-growing.

A childhood behavior disorder with persistent anger, defiance, and vindictiveness.

Inflammation of the optic nerve causing vision loss, often an early sign of MS.

Cancer of the mouth, tongue, or lips, strongly linked to tobacco and alcohol use.

Recurrent cold sores around the lips caused by herpes simplex virus type 1.

Inflammation of one or both testicles, often from viral or bacterial infection.

A drop in blood pressure when standing up, causing dizziness or fainting.

Painful swelling below the kneecap in adolescents during growth spurts.

A joint condition where a piece of cartilage and bone separates from the surrounding area.

Brittle bone disease — a genetic disorder causing fragile bones.

Softening of bones in adults from vitamin D deficiency.

A bone infection, most often bacterial, that can become chronic if not treated.

A primary bone cancer most common in teenagers and young adults.

Swimmer's ear — infection of the outer ear canal, often after water exposure.

Middle ear infection, very common in children after upper respiratory illness.

Abnormal bone growth in the middle ear causing progressive hearing loss.

A fluid-filled sac on the ovary, most often benign and self-resolving.

Sudden urges to urinate that may be difficult to control.

An inherited urea cycle disorder causing dangerous ammonia buildup.

A migraine with temporary visual disturbances, with or without headache.