Drink or substance abuse
While neither drinking or the use of drugs are signs of an abusive personality, heavy drinking or drug abuse may be a warning sign and do increase the risks of abuse, especially violence, taking place.
Often an abusive person will blame the drink for his/her abuse. However, a person who, knowing there is a risk he/she could be violent when drinking or on drugs, chooses to get drunk or high, is in effect choosing to abuse.
The link between substance abuse and domestic abuse is still being researched, and it is apparent that while neither alcohol nor drugs necessarily cause violence, they do increase the risk of violence.