Having headaches on the low left side of my head?

Where exactly . Many causes, it may be an ear infection, temporal arteritis, tumor, hypertension, muscular . Many things can cause headaches. Headaches may be benign but it worries me a lot, until i find the cause and treatment. Please see a doctor.
Headache. The diagnosis headache is not tests but 95% history. Must keep diary of how why what when. What could have triggered it- foods stimulants like flashing lights, poor sleep quality night before. List can go on and on. Consult someone who takes time to put all ur information together like neurologist, headache specialist or physician who takes time to listen to patient and obtain detailed history.On.
Get them evaluated. Headaches have many causes, some not so serious and some very serious. If your headaches are significant then a neurologist ca help.