Use Energy Drinks and Painkillers

Energy drinks and painkillers auto-heal you for a duration of time, and also give you a speed-boost, so use them often and as needed. Most healing equipment like bandages and health packs won’t heal you past 75%. Only the med-kit can heal you up to 100% and that’s very rare. Energy drinks and painkillers take their time to heal you, but they’ll take you up to 100% so make sure you use them often.