A fever that settles with Crocin and then returns after a couple of days usually means the underlying infection has not fully cleared. Keep yourself well hydrated with frequent fluids and take light, simple meals so your body can recover, and get enough rest to support healing. You can continue basic measures like lukewarm sponging if the fever rises, and avoid taking medicines repeatedly without knowing the cause. Try to note when the fever comes back and any other symptoms that appear. If this pattern continues or the fever starts increasing, consult a doctor to determine the cause and guide appropriate treatment.