Symptoms — MS Glossary

Cognitive fog, sometimes called brain fog or cog fog, describes trouble with thinking clearly. It can include slower processing, losing your...

MS fatigue is a deep, heavy tiredness that is different from being sleepy or out of shape. It can show up even after a full night of rest an...

Foot drop is trouble lifting the front of the foot while walking, which can cause the toes to drag or catch. It happens when the nerves that...

Optic neuritis is inflammation of the nerve that carries signals from the eye to the brain. It often causes blurry vision, a dim or washed-o...

Paresthesia is the medical word for feelings like numbness, tingling, pins and needles, or a buzzing sensation in the skin. In MS, it can sh...

Spasticity is unusual stiffness or tightness in muscles, often in the legs. It can feel like a muscle that will not relax, a sudden jerk, or...

Uhthoff's phenomenon is when MS symptoms temporarily get worse as your body heats up. Triggers can include hot weather, a hot shower, exerci...