In San Andreas during the mission called 'Reuniting The Families' the player can regenerate his health by kissing prostitutes.
Entering an Ambulance will also restore a small amount of health. Health can be regained by eating food, saving, or picking up a health 'power-up' or first-aid kit. When the player's health is depleted, they are Wasted, which results in mission failure, and the player being sent to hospital to be revived. Rather than recording progress or activities, these statistics are displayed onscreen during gameplay in the Heads-Up Display (HUD), to give the player a greater awareness of the protagonist's condition and situation. Statistics in the Grand Theft Auto: San Andreas pause menu.
There are two distinct elements to the statistics - The Pause Menu Stats option which provides an in-depth analysis of the players activities in the game and their achievements, and a HUD List which, since Grand Theft Auto: San Andreas, provides more of a role-playing-game style list of character attributes and skills.