Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
Call emergency services for new, severe, or unexplained chest pain, especially if it feels like pressure, squeezing, heaviness, or tightness.
Emergency assessment is also important if chest pain occurs with:
Do not drive yourself if you may be having a medical emergency.
Tietze syndrome cannot be safely identified from symptoms alone during a new episode.
Seek prompt medical advice if the swollen area becomes increasingly red, hot, or painful, or if you develop a fever.
These features may indicate infection or another cause.
Significant chest injury, difficulty breathing, an enlarging lump, or pain that is rapidly worsening also needs timely assessment.
Arrange routine follow-up if pain or swelling is not improving, keeps returning, or limits normal activities.
Review is also appropriate if the pattern changes or if recommended pain relief is ineffective or causes side effects.
Every sign above is quoted from the sofidex article on Tietze syndrome. If you are not sure, err upward — it is always reasonable to be checked.