Warning Signs After a Hospital Discharge: When to Call

By the RelayNest Care Team · Reviewed August 2026 · 6 min read

Every discharge conversation includes some version of "call us if anything comes up." The problem is that at 9pm on day four, "anything" is doing a lot of work. Is a low-grade fever an emergency? Is new leg swelling a wait-until-Monday thing? Families who don't know tend to do one of two dangerous things: call 911 for everything, or — far more often — wait and see. The fix is a plan with three tiers, agreed on before you need it: what means call 911 now, what means call the care team today, and what means mention it at the next visit. Below are the common examples families are often told to watch for in each tier. Use them as a starting point for the conversation with your own care team — not as the final word.

Tier 1: Call 911 now

These are the signs that are treated as emergencies regardless of what someone was hospitalized for. Don't drive to the ER yourself, don't call the office first, don't wait to see if it passes.

• Chest pain or pressure, especially with sweating, nausea, or pain spreading to the arm or jaw.
• Trouble breathing — new shortness of breath at rest, gasping, or lips turning bluish.
• Sudden confusion — someone who was clear this morning and can't follow a conversation now.
• Signs of stroke. The CDC's FAST test: Face drooping on one side, Arm weakness or numbness, Speech that's slurred or strange — Time to call 911, and note the time symptoms started.
• Uncontrolled bleeding — from a wound, in vomit, or in stool — that doesn't stop with pressure.
• Fainting, a serious fall, or unresponsiveness.

Tier 2: Call the care team today

Not 911 — but not "see how the weekend goes" either. These are the signs that most often precede a readmission, and they are exactly what the office's phone line and after-hours service exist for. Same-day means same-day: if it's after hours, use the on-call number you were given at discharge.

• A fever — at the threshold your care team gave you, or any fever if they didn't give one and you're unsure.
• New or worsening pain that the prescribed medication isn't controlling.
• Wound changes — spreading redness, warmth, swelling, drainage, or an opening incision.
• Can't keep medications down — vomiting that means doses aren't staying in counts as missed doses, and the team needs to know.
• Little or no urination, or urine that's suddenly dark, painful, or foul-smelling.
• Swelling in one leg, especially with warmth or tenderness in the calf.
• Confusion or drowsiness that's new but mild — more nap than usual is one thing; hard to wake is a call.

Tier 3: Mention at the next visit

These usually don't need a phone call, but they absolutely need to be written down — patterns here are how the care team catches medication side effects and slow-motion problems. If any of these gets steadily worse, it moves up a tier.

• Appetite changes — eating noticeably less, or food tasting wrong (a known medication effect).
• Sleep changes — trouble falling asleep, sleeping much more than usual, vivid dreams.
• Mild fatigue that's stable or slowly improving.
• Constipation — extremely common after hospital stays and with pain medications; worth reporting before it becomes a Tier 2 problem.
• Low mood or irritability — recovery is hard, but persistent low mood is worth naming out loud.

Ask the discharge team: "Which signs apply to us specifically?"

Here is the most important thing on this page: the general list is not your list. A knee-replacement recovery and a heart-failure recovery have different warning signs, and some of the most important ones are condition-specific — daily weight changes for one patient, incision checks for another. Before you leave the hospital (or at the first follow-up, if that ship has sailed), ask directly: "Which warning signs apply to us specifically? Which of these mean call 911, which mean call you today, and what number do we use after 5pm?" AHRQ's IDEAL Discharge Planning approach urges care teams to walk families through exactly this — but in a rushed discharge, it's often the family that has to ask. Write down the answers, including the specific thresholds your team gives you, next to the phone numbers.

Make the plan visible — to everyone

A warning-signs plan that lives in one person's memory fails on the night that person isn't there.

• Post it on the refrigerator. One page: the three tiers, the specific signs your team named, and every phone number — office, on-call line, pharmacy — right next to them.
• Share it with every caregiver — siblings, the weekend helper, the neighbor who checks in. Anyone who might be the one in the room needs to know what "call today" looks like.
• Keep the numbers with the list, not in someone's phone. The moment you need the on-call number is the wrong moment to be texting your sister for it.
• Update it after every appointment. When the care team adjusts the plan, the fridge copy and the shared copy both change — an outdated warning list is worse than none.

One last time, because it's the rule that covers every gap in every list: when you're not sure, call. Care teams would far rather answer an unnecessary call than hear "we didn't want to bother you" in the emergency department. That's the entire message of the Joint Commission's Speak Up campaign — speaking up early is not overreacting; it's the job.