diff --git a/src/components/layout/page-header.tsx b/src/components/layout/page-header.tsx
index 8a312a1..9a33608 100644
--- a/src/components/layout/page-header.tsx
+++ b/src/components/layout/page-header.tsx
@@ -1,29 +1,71 @@
 // PageHeader — consistent header layout for all list pages.
 //
-// Row 1: Title (+ optional badge + subtitle) on the left,
+// Row 1: Title (+ optional badge + info icon) on the left,
 //         controls (search, columns, export, etc.) on the right.
 // Row 2: Optional tabs (underline style) — no extra borders.
 //
+// The `infoText` prop renders as a hoverable info icon (ⓘ) next to
+// the title. Long descriptive text goes here instead of inline
+// subtitle — keeps the header compact.
+//
 // Usage:
 //   <PageHeader
-//       title="Appointments"
-//       badge={37}
-//       subtitle="Manage appointments"
+//       title="Contacts"
+//       badge={16}
+//       infoText="People who reached out directly — phone, walk-in, referral."
 //       controls={<><Input .../> <Button .../></>}
 //       tabs={<Tabs ...><TabList ...>{...}</TabList></Tabs>}
 //   />
 
-import type { ReactNode } from 'react';
+import { useState, useRef, useEffect, type ReactNode } from 'react';
+import { FontAwesomeIcon } from '@fortawesome/react-fontawesome';
+import { faCircleInfo } from '@fortawesome/pro-duotone-svg-icons';
 
 interface PageHeaderProps {
     title: string;
     badge?: number | string;
+    /** Short inline text next to badge — use sparingly (e.g. "17 total") */
     subtitle?: string;
+    /** Longer descriptive text shown on info icon hover/click */
+    infoText?: string;
     controls?: ReactNode;
     tabs?: ReactNode;
 }
 
-export const PageHeader = ({ title, badge, subtitle, controls, tabs }: PageHeaderProps) => (
+const InfoTooltip = ({ text }: { text: string }) => {
+    const [open, setOpen] = useState(false);
+    const ref = useRef<HTMLDivElement>(null);
+
+    useEffect(() => {
+        if (!open) return;
+        const handler = (e: MouseEvent) => {
+            if (ref.current && !ref.current.contains(e.target as Node)) setOpen(false);
+        };
+        document.addEventListener('mousedown', handler);
+        return () => document.removeEventListener('mousedown', handler);
+    }, [open]);
+
+    return (
+        <div className="relative" ref={ref}>
+            <button
+                onClick={() => setOpen(!open)}
+                onMouseEnter={() => setOpen(true)}
+                onMouseLeave={() => setOpen(false)}
+                className="flex size-5 items-center justify-center rounded-full text-fg-quaternary hover:text-fg-secondary transition duration-100 ease-linear"
+                title={text}
+            >
+                <FontAwesomeIcon icon={faCircleInfo} className="size-4" />
+            </button>
+            {open && (
+                <div className="absolute left-0 top-full mt-1 z-50 w-72 rounded-lg bg-primary px-3 py-2 text-xs text-tertiary shadow-lg ring-1 ring-secondary">
+                    {text}
+                </div>
+            )}
+        </div>
+    );
+};
+
+export const PageHeader = ({ title, badge, subtitle, infoText, controls, tabs }: PageHeaderProps) => (
     <div className="shrink-0">
         {/* Row 1: title + controls */}
         <div className="flex items-center justify-between px-6 py-3">
@@ -37,6 +79,7 @@ export const PageHeader = ({ title, badge, subtitle, controls, tabs }: PageHeade
                 {subtitle && (
                     <span className="text-sm text-tertiary ml-1">{subtitle}</span>
                 )}
+                {infoText && <InfoTooltip text={infoText} />}
             </div>
             {controls && (
                 <div className="flex items-center gap-2">
diff --git a/src/pages/all-leads.tsx b/src/pages/all-leads.tsx
index 1745b3f..3f4a57c 100644
--- a/src/pages/all-leads.tsx
+++ b/src/pages/all-leads.tsx
@@ -246,6 +246,7 @@ export const AllLeadsPage = () => {
             <PageHeader
                 title="All Leads"
                 subtitle={`${total} total`}
+                infoText="Campaign-sourced marketing leads. Organic callers are on the Contacts page."
                 controls={
                     <>
                         <div className="w-56">
diff --git a/src/pages/appointments-v2.tsx b/src/pages/appointments-v2.tsx
index 9571ae6..786f748 100644
--- a/src/pages/appointments-v2.tsx
+++ b/src/pages/appointments-v2.tsx
@@ -555,6 +555,7 @@ export const AppointmentsPageV2 = () => {
             <PageHeader
                 title="Appointments"
                 badge={filtered.length}
+                infoText="All scheduled, completed, cancelled, and rescheduled appointments. Click the eye icon to view details or reschedule."
                 controls={
                     <div className="w-56">
                         <Input
diff --git a/src/pages/call-desk.tsx b/src/pages/call-desk.tsx
index 64e85b5..90af3ec 100644
--- a/src/pages/call-desk.tsx
+++ b/src/pages/call-desk.tsx
@@ -16,6 +16,8 @@ import { ActiveCallCard } from '@/components/call-desk/active-call-card';
 import { apiClient } from '@/lib/api-client';
 import { notify } from '@/lib/toast';
 import { cx } from '@/utils/cx';
+import { FontAwesomeIcon as FAIcon } from '@fortawesome/react-fontawesome';
+import { faCircleInfo } from '@fortawesome/pro-duotone-svg-icons';
 
 export const CallDeskPage = () => {
     const { user } = useAuth();
@@ -166,11 +168,14 @@ export const CallDeskPage = () => {
 
     return (
         <div className="flex flex-1 flex-col overflow-hidden">
-            {/* Compact header: title + name on left, status + toggle on right */}
-            <div className="flex shrink-0 items-center justify-between border-b border-secondary px-6 py-3">
-                <div className="flex items-center gap-3">
+            {/* Header — matches PageHeader visual pattern */}
+            <div className="flex shrink-0 items-center justify-between px-6 py-3">
+                <div className="flex items-center gap-2">
                     <h1 className="text-lg font-bold text-primary">Call Desk</h1>
-                    <span className="text-sm text-tertiary">{user.name}</span>
+                    <span className="text-sm text-tertiary ml-1">{user.name}</span>
+                    <span className="flex size-5 items-center justify-center text-fg-quaternary" title="Your active worklist — missed calls, leads, and follow-ups prioritised by SLA.">
+                        <FAIcon icon={faCircleInfo} className="size-4" />
+                    </span>
                 </div>
 
                 <div className="flex items-center gap-2">
diff --git a/src/pages/call-history.tsx b/src/pages/call-history.tsx
index d2939f6..5b30340 100644
--- a/src/pages/call-history.tsx
+++ b/src/pages/call-history.tsx
@@ -194,6 +194,7 @@ export const CallHistoryPage = () => {
                     title={isAdmin ? 'Call History' : 'My Call History'}
                     badge={filteredCalls.length}
                     subtitle={isAdmin ? `${completedCount} completed \u00B7 ${missedCount} missed` : `${completedCount} completed`}
+                    infoText={isAdmin ? 'All calls across all agents with recordings and dispositions.' : 'Your answered inbound and outbound calls.'}
                     controls={
                         <>
                             <div className="w-44">
diff --git a/src/pages/contacts.tsx b/src/pages/contacts.tsx
index ccc77bf..51df4bc 100644
--- a/src/pages/contacts.tsx
+++ b/src/pages/contacts.tsx
@@ -116,7 +116,7 @@ export const ContactsPage = () => {
             <PageHeader
                 title="Contacts"
                 badge={contacts.length}
-                subtitle="People who reached out directly — phone, walk-in, referral. Not sourced from campaigns."
+                infoText="People who reached out directly — phone, walk-in, referral. Not sourced from campaigns."
                 controls={
                     <>
                         <div className="w-56">
diff --git a/src/pages/missed-calls.tsx b/src/pages/missed-calls.tsx
index f53bdf3..4b5fdc0 100644
--- a/src/pages/missed-calls.tsx
+++ b/src/pages/missed-calls.tsx
@@ -242,6 +242,7 @@ export const MissedCallsPage = () => {
             <PageHeader
                 title="Missed Calls"
                 badge={calls.length}
+                infoText="Inbound calls that were not answered. Agents can call back from here."
                 controls={
                     <>
                         <ColumnToggle columns={columnDefs} visibleColumns={visibleColumns} onToggle={toggleColumn} />
diff --git a/src/pages/patients.tsx b/src/pages/patients.tsx
index 0fa18d2..bcf16b1 100644
--- a/src/pages/patients.tsx
+++ b/src/pages/patients.tsx
@@ -131,7 +131,7 @@ export const PatientsPage = () => {
             <PageHeader
                 title="All Patients"
                 badge={filteredPatients.length}
-                subtitle="Manage and view patient records"
+                infoText="Manage and view patient records"
                 controls={
                     <>
                         <button