AAG can refer to different things depending on the context. Here are some possible meanings based on the search results:

• American Advisors Group: AAG is an American reverse mortgage lender that provides government-insured Home Equity Conversion Mortgage loans. They help seniors tap into the equity in their homes to create a sound financial plan for retirement.

• Autoimmune Autonomic Ganglionopathy: AAG is a rare type of autonomic neuropathy where the immune system attacks the autonomic nervous system. Symptoms can include fainting, low blood pressure, constipation, dilated pupils, dry mouth and eyes, and urinary retention. Treatment usually focuses on symptom management and may include plasma exchange, intravenous immunoglobulin therapy, corticosteroids, or immunosuppressive drugs. The underlying cause of AAG is poorly understood, and approximately one third of people with AAG get better without treatment, but the recovery is often incomplete.