Hi there, thanks for asking. It could be a harbinger (an early sign) for the onset of migraine
attack. Half of migraines have some early signs such a thing you mentioned. It is a good time to take a medication which can prevent or cure the attacks. It is good to have a full neurological examination in order to see if there is any possible problem in your nervous system, although it is not urgent. Some migraines that are accompanied with other symptoms may be a manifestation of an underlying issue. I wish you a good health.