Complications of Horton’s disease are linked to a stop of circulation in the inflammatory arteries. These complications can make the disease serious.

– The eye complications occur when an artery supplying the eye becomes blocked, or when an artery supplying a nerve in the eye becomes blocked. Thus 1 to 2% of people with Horton’s disease have a risk of total loss of sight. This is why at the slightest sign of loss of vision, it is necessary to consult urgently.

— Stroke : it may or may not be transient (the artery becomes blocked and then unblocked). 5% of people with Horton’s disease have this complication. In case of signs, it is also necessary to consult very quickly.

— Psychiatric complications, in 3% of patients. There is a temporo-spatial disorientation (“I no longer know where I am or when”) or mood disorders. This is cured by corticosteroid treatment.

– Other arterial damage to the heart, lungs, aorta, upper or lower limbs, kidneys, etc.