“How long does paralysis last after a stroke?”

Paralysis after a stroke can be permanent

It depends on the severity and damage to the brain from the stroke but with physical therapy, occupational therapy and speech therapy.

I am sorry to say that there is no answer that fits everyone. Strokes are highly variable as to which part of the brain is affected, how much of the brain is affected, which part of the body is "paralyzed," and whether or not such paralysis is complete. Other variables include age, health, plasticity, and treatment available. You are young, so that is a good sign. For the purposes of my answer, I am assuming "stroke" to mean a cerebrovascular occlusive event, and not a hemorrhage or something else. Good luck!

Paralysis after a stroke can be brief, a few hours to days in what is known  as a TIA (Transient ischemic attack). It can last several weeks to months if there's rapid implementation of recirculation (treated within 24 to 72 hours with tpa = thrombolysis = medication to break up or dissolve the clot). Other times, unfortunately, rapid return of blood supply to the area may not be established soon enough and paralysis may be permanent.