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 severe trouble breathing, blue or grey lips, fainting, new severe chest pain, vomiting blood, black stools with weakness, or sudden severe abdominal pain.
Percussion itself rarely causes urgent problems.
However, the symptoms that led to your examination may need prompt attention.
Seek urgent medical advice for worsening shortness of breath, increasing abdominal pain, persistent vomiting, fever with worsening illness, or new blood in your urine.
Do not wait for a routine follow-up appointment.
Routine follow-up is appropriate if you have questions about what was found, are waiting for another test, or your original symptoms continue or return.
Contact your healthcare team if tapping caused unexpected pain, swelling, or bruising that does not settle.
Every sign above is quoted from the sofidex article on Percussion. If you are not sure, err upward — it is always reasonable to be checked.