Mri brain done for tingling sensation in left predominantly. One dr diagnosed as lacunar infarct other called it ivy space. What to do...

Can't say. They can look very similar, but in your age group in certain locations, a perivascular spaces (sometimes called virchow robin spaces) are very common and I'm guessing more likely in your case. Haven't heard it called ivy spaces, but I'm guessing it's the same thing... Hard to say without actually seeing the image.