Hidden headaches can be caused by physiological reasons, neurasthenia, hypertension, colds and other reasons. 1. Physiological reasons: such as fatigue, lack of sleep can appear vague headache symptoms, rest and improve sleep can be relieved, no need for medication. 2. Neurasthenia: the disease can lead to the patient’s mental excitement, brain fatigue, often make the patient think too much, combined with sleep disorders. Prolonged sleep deprivation, resulting in cerebral nerve dysfunction, may manifest vague headache, may also be accompanied by poor mental health, physical weakness and other symptoms. 3. Hypertension: When the blood pressure rises, especially when the blood pressure rises by a large margin, the pressure inside the cerebral blood vessels increases significantly, resulting in the blood vessels filling up the local meninges causing stimulation, which may cause vague headaches, and in severe cases, may also be accompanied by nausea, vomiting and other symptoms. 4. Cold and flu: when a cold occurs, resulting in viral invasion of the body, it may cause headaches, but also may be accompanied by nasal congestion, sore throat and other symptoms. There are many factors that can cause a vague headache, and it is recommended that people with long lasting or recurring headaches should consult a doctor as soon as possible to identify the cause and get reasonable treatment.