To elaborate on this: one of the uses of the Medicine skill is to Treat Wounds. At the basic level this is a DC 15 check that takes 10 minutes, heals 2d8 hp and removes the Wounded condition, and can't be repeated on the same character for 60 minutes. If your Medicine proficiency is higher than Trained, you can make progressively harder checks that heal a lot more. There are also some skill feats that improve this, notably Continual Recovery which removes the 60 minute cooldown, and Ward Medic which lets you Treat the Wounds of two or more characters simultaneously. Both these skill feats require you to be an Expert in the skill, which you normally can't be until 3rd level, so unless you push really hard you won't get both until 6th level (Expert at 3rd, one feat at 4th, the other at 6th). There are ways to get them faster, but that requires being a skill monkey class (Rogue or Investigator) or sinking serious resources into it.Healing/rest is another aspect that is a bit different in PF2. You still have the cleric/druid/bard dynamic, but any character can take a medicine or healer feat. Fights expect players at full health in PF2 and the mini game around healing can be a major headache. Its not uncommon for players asking how many 10 min breaks they can take. I tend to just handwave it if the players can rest for 10-30 min without worry, they just heal up (assuming they have the spells and abilities to do so).
Treat Wounds is really nice, and makes it so you can expect to start every encounter at or near max hp, assuming there's no time strong time pressure. But it does require someone in the party to be a medic, and likely max out Medicine and getting at least one skill feat. But once you get there, you don't have to worry about hp attrition at all anymore. It's sort of like 4e short rest healing, except with infinite healing surges. In this model, healing spells (heal and the occult version soothe) are more for emergency healing – and given the amount they heal, they're pretty good at that. A top-level heal will likely heal a front-liner for about 50% of their max hp.
I've considered using the Stamina optional rule for my next campaign (or possibly implementing it if I go on with Extinction Curse). What it does is that it essentially splits hp into two halves (more or less): hit points and stamina. Hit points work the same, except that your stamina "shields" them – damage first comes off your stamina, and only when you're out of that you start losing hit points. You also have a number of Resolve points equal to your primary stat bonus, and you can spend 10 minutes and a resolve point to "take a breather" which restores all your stamina.
The effect of this is that you can get on pretty well without Treat Wounds, or at least without pushing it hard (since it only applies to the lower half of your hp anyway), but on the other hand there's a secondary resource that limits your daily non-magic healing.