A headache without fever after catching a cold is related to viral infection on the one hand, and insufficient rest or self-causes on the other hand, in addition, medication and the combination of other diseases can also cause headache. The first thing to consider is that headaches are caused by colds. Colds are caused by viral infections, which can affect the normal function of nerves and blood vessels, leading to abnormal nerve conduction or cerebral vasoconstriction, which can lead to headaches. In addition, it is related to insufficient rest or self-causes. If you don’t have enough rest after a cold, you may have a headache. Or if you have a lot of mental stress, you may have a physiological headache, which is mainly caused by your own reasons. It should also be noted that some cold medicines may also cause headache as a side effect, and it is necessary to rule out the possibility of other diseases, such as migraine. Therefore, it is recommended to consult a doctor in a timely manner, under the guidance of the doctor to carry out relevant examinations to assist in the assessment and clarification, and comply with the doctor’s instructions for symptomatic treatment.