Can chronic tension head aches lead to something severe?

Yes: The chronic tension is the danger, not the headaches , per.Se. A life spent in chronic tension can lead to severe cardiovascular (heart attack, stroke) complications later in life. It would be useful if you would do what needs to be done to lower the stress in your life, be that a change in lifestyle, employment, getting good psychotherapy.

Headache cause: The accuracy of the diagnosis is very important. Associated symptoms would be important to know. Medications that you are currently on and started before onset. Prior evaluations and results - mri, ct scan, eeg, neuro + medical exam, blood tests, counseling. Family history of headaches or other medical/neurological problems the chronology of the onset and evolution of headache.What type of pain?

Tension Headaches: Many people have tension headache. These are caused by muscle changes primarily in the neck, shoulders, leading to scalp and classic tension headaches. There is no known damage from these headaches even if they happen multiple times in a week. Taking to many otc medications, such as Aspirin or ibuprofen, could cause ulcers, severe bleeding. Start with ice, heat, massage, relaxation.