Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
Emergency care is appropriate for breathing difficulty, confusion, seizures, fainting, severe dehydration, major bleeding, severe abdominal pain, or rapid worsening.
These warning signs should not wait for a routine appointment.
Many people can have routine follow-up with a primary care clinician after the fever settles.
Follow-up is especially useful if joint pain limits daily activities, symptoms return, or recovery is slower than expected.
A follow-up visit may include another examination and, when appropriate, repeat blood tests.
Persistent joint symptoms may require evaluation for ongoing chikungunya-related inflammation or another condition that can cause arthritis.
The article also says
Contact a clinician if:
Fever continues, returns, or is accompanied by new symptoms
Joint pain or swelling remains significant after the acute illness
Pain prevents walking, working, sleeping, or completing daily tasks
New weakness, numbness, vision changes, or severe headaches develop
There are concerns about medicine side effects
An infant, older adult, or pregnant person has been exposed or becomes unwell
Before future travel, ask about current outbreak information and mosquito-bite prevention.
A travel health professional can also determine whether vaccination should be considered under current recommendations.
Every sign above is quoted from the sofidex article on Arbovirus A chikungunya type. If you are not sure, err upward — it is always reasonable to be checked.