Unfortunately, a close member of my family suffers from alcoholism. 
I'm sorry to hear that. Alcohol usually affects the brain, heart, liver, pancreas, and immune system more than other parts of the body. Does your family member have any problems due to alcohol?
Yes, I think her liver is starting to show the effects. She's been drinking long term- over 20 years.
nervous system and peripheral nervous system can occur from chronic alcohol abuse. Even light and moderate alcohol consumption increases risk for certain types of cancer. 
The long-term use of alcohol is capable of damaging nearly every organ and system in the body. The developing adolescent brain is particularly vulnerable to the toxic effects of alcohol. In addition, the developing fetal brain is also vulnerable, and fetal alcohol spectrum disorders (FASDs) may result if pregnant mothers consume alcohol.
The inverse relation in Western cultures between alcohol consumption and
strongly desired, usage results in not fulfilling responsibilities, usage results in social problems, usage results in health problems, usage results in risky situations, withdrawal occurs when stopping, and alcohol tolerance has occurred with use. Risky situations include drinking and driving or having unsafe sex, among other things. Alcohol use can affect all parts of the body, but it particularly affects the brain, heart, liver, pancreas and immune system. This can result in mental illness, Wernicke–Korsakoff syndrome, irregular heartbeat, an impaired immune