This patient support community is for discussions relating to Dysautonomia (Autonomic Dysfunction) including: Postural orthostatic tachycardia syndrome (POTS), neurocardiogenic syncope, mitral valve prolapse dysautonomia, pure autonomic failure, autonomic instability and others.
I believe there was mention that those who's POTS hit in post-viral circumstances tend to be more likely to recover like this. Also, those for whom it shows up in adolescence have a decent chance of coming out of it... perhaps tending to do so in their early adulthood.
Please take my comment with a grain of salt... this is what I recall reading but I cannot recall for certain and it isn't very specific information.
As 'supineallthetime' mentioned, patients with post-viral POTS are generally more likely to experience recovery. However, children and young teenagers may simply outgrow their symptoms entirely upon entering adulthood. It really depends on the situation.
For patients with associated illnesses, (for example: Ehlers-Danlos Syndrome), such improvements are considered to be somewhat less likely. However, that is not to say impossible. You may try asking a doctor about your specific situation...
Additionally, as 'kelly1258' mentioned, some patients have done well with various medications despite their POTS/Dysautonomia.
As for differential diagnoses, there are conditions that exhibit Dysautonomia as a symptom. Examples include: certain Autoimmune Disorders, Addison's Disease, and Mitochondrial Diseases.