Ankylosing Spondylitis Tracker

Log morning stiffness, spinal pain, fatigue, and inflammation daily — so your rheumatologist has a real picture of your AS, not just how you feel on appointment day.

Why tracking matters with ankylosing spondylitis

Ankylosing spondylitis is an inflammatory condition that affects the spine and sacroiliac joints, and it has a particular characteristic that makes tracking especially valuable: symptoms fluctuate significantly. You might have a stretch of reasonably manageable days followed by a week that barely lets you get out of bed. If your rheumatology appointment falls on a good week, there's a real risk that the assessment doesn't reflect your actual disease activity.

A daily AS symptom diary solves this problem. When you bring months of logged data to your appointment — including your best and worst days — your rheumatologist gets an accurate picture of where you actually sit on the activity spectrum. The standard disease activity tools for AS, like the BASDAI, rely heavily on patient-reported symptoms: pain, fatigue, stiffness, and how these affect function. Your log makes those assessments more accurate and more complete.

Morning stiffness duration is one of the most clinically watched AS metrics. Tracking how long it takes your back to loosen up after waking — whether it's 20 minutes or 3 hours — over weeks and months gives your rheumatologist longitudinal data that no single appointment can capture. And if you're trialling a new medication or a change in NSAIDs, you need that baseline data to measure whether things are actually improving.

What to track with AS

Morning stiffness (duration) Log how many minutes or hours of stiffness you experience after waking. This single metric is one of the most useful clinical indicators of AS disease activity and is tracked explicitly in standard assessment tools.
Spinal and SI joint pain (0–10) Rate your back and sacroiliac pain daily. Note whether it's improved by movement (as is typical with inflammatory pain) or worsened — this helps confirm the inflammatory versus mechanical nature of what you're experiencing.
Fatigue AS fatigue can be as disabling as pain. It's also a useful marker of systemic inflammation. Tracking it alongside pain and stiffness gives your rheumatologist a fuller picture of how the disease is affecting your life.
Peripheral joint pain Some people with AS develop pain in hips, knees, shoulders, or other joints. Note any peripheral involvement, as it can affect treatment decisions.
Activity and function Log how AS is affecting your daily activities — work, exercise, tasks around the home. Functional impact is a key part of how disease severity is assessed and how treatment response is measured.
Flare flag Mark your flare days explicitly. Note what preceded the flare — overexertion, illness, stress, dietary factors — and how long it lasted. Over time, these notes often reveal personal flare patterns.

How to use The Good Tracker for AS

The morning is often the hardest time with AS — you wake up stiff, and opening an app to log might feel like the last thing you want to do. The Good Tracker is designed to make this as low-effort as possible. Voice logging means you can record "pretty stiff this morning, maybe an hour before I could move normally, pain around a six" without typing anything. Sliders let you score your key metrics in under a minute once you're up and moving.

Build the habit at the same time each day. For AS, morning is the most useful logging window — you capture morning stiffness duration before it fades, and set your daily baseline. Some people do a second brief log in the evening to capture how much the day improved (or didn't). Even once-a-day logging builds meaningful data over weeks.

Log your medications each day, especially if you're on NSAIDs, biologics, or both. Tracking medication use alongside symptom scores helps you and your rheumatologist assess whether your current regimen is achieving adequate control, or whether a change is warranted.

AS tracking tip: Note how your stiffness responds to movement on flare days. If movement improves it significantly — characteristic of inflammatory stiffness — that's clinically useful information. If it worsens, note that too. This detail helps your rheumatologist differentiate inflammatory from non-inflammatory pain components, which shapes treatment choices.

Frequently asked questions

What should I track with ankylosing spondylitis?

The most useful AS metrics to track daily include morning stiffness duration and severity, spinal and sacroiliac pain, fatigue, peripheral joint involvement, and the impact on daily activities and sleep. Stiffness duration — how long it takes for your back to loosen up after waking — is particularly valuable, as this is a standard indicator rheumatologists use to assess disease activity.

How do I know if I'm having an AS flare?

An AS flare typically involves a notable increase in pain, stiffness, and fatigue beyond your usual baseline — often lasting days to weeks. Because AS symptoms naturally fluctuate, distinguishing a true flare from a bad day is easier with a consistent daily log. When you can see your baseline on a chart, a flare stands out clearly.

Does exercise help AS, and how can tracking reveal this?

Exercise and movement are generally considered beneficial for AS — unlike many conditions, rest often worsens AS stiffness while gentle movement tends to improve it. Tracking activity level alongside stiffness and pain scores can help you see this pattern in your own data. Many people find that days following gentle exercise show lower stiffness the next morning.

How can my symptom log help my rheumatologist?

Rheumatologists assess AS disease activity using tools like the BASDAI, which relies heavily on patient-reported symptoms including fatigue, spinal pain, and stiffness. A consistent daily log gives your rheumatologist a longitudinal picture of these metrics — not just how you feel on the day of the appointment. This makes assessments more accurate and supports decisions about biologic therapy, NSAID dosing, or other interventions.

Start tracking your AS symptoms — free

No account required to begin. Log your morning stiffness, pain, and fatigue in under a minute — and build the record your rheumatologist needs.

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