Hello Sir, In 2008 I Had Weakness In Hands And

hello sir, in 2008 i had weakness in hands and legs sometimess i feel dizzy.checked with neuro and had CT scan ,blood test etc all came normal. After few months the weakness went off itself.The problem is i am getting weakness in hand and legs on and off . it comes and stay for few days and goes. For past one year i didnt had this complain but recently again it started and the weaknees coming and going.Please help...