CCMs may exist without apparent symptoms. Seizures may occur when there is a CCM on the outer surface of the brain. CCMs CCM A wide variety of signs and symptoms may occur when CCMs are found in the brainstem, basal ganglia and spinal cord. For example, bleeding in the spinal cord may cause bowel and bladder symptoms or trouble with movement or feeling in the legs or arms. CCMs Generally, signs and symptoms of CCMs may include: CCMs 
Seizures
Severe headaches
Weakness in the arms or legs
Numbness
Difficulty speaking
Problems with memory and attention
Problems with balance and walking
Vision changes, such as double vision
 Neurological issues can progressively worsen over time with recurrent bleeding. Repeat bleeding can happen soon after an initial bleed or much later. In other cases, a repeat bleed may never occur.