What could cause a spasm feeling inside head lasting just seconds at time?

* Muscle contractions: Muscle contractions in the head, such as those caused by stress, tension headaches, or migraines, can cause a spasm-like feeling.

* Nerve irritation: Irritation of the nerves in the head, such as those caused by sinus infections, allergies, or temporomandibular joint (TMJ) disorders, can also cause spasm-like feelings.

* Blood vessel problems: Blood vessel problems in the head, such as high blood pressure or vasospasms (sudden constrictions of the blood vessels), can cause spasm-like feelings.

* Brain tumors: In rare cases, brain tumors can cause spasm-like feelings.

If you are experiencing spasm-like feelings in your head, it is important to see a doctor to determine the cause and receive appropriate treatment.