Do you have to do an EEG to check if you have infantile spasms?

Patient's question:

When relapsing, it manifests as sudden, intense twitching of the large muscles throughout the body, with the head and torso leaning forward, the upper limbs extended and bent inward, and the lower limbs bent toward the abdomen. The eyes are teary. Each episode is short, lasting only 1 to 2 seconds before subsiding, followed by another twitch soon after, forming a series of relapses—ranging from 2 to 3 episodes to as many as ten. After relapse, the infant may cry and fuss. Relapses are more likely shortly after waking, and sometimes the infant is sensitive to loud noises. I wonder if it might be infantile spasms? I've been to several hospitals, and they all say it's due to calcium deficiency, but I still want to get a definitive diagnosis. Is an EEG necessary? Will it affect the infant? Duration and frequency of the current episode: One week ago (lasting for a week) Current general condition: Already

Doctor's answer:

Hello, it is generally related to calcium deficiency. [Intravenous administration can cure it] It is necessary to rule out epilepsy, tetanus, etc. CT or magnetic resonance imaging can be used. An electroencephalogram is relatively inexpensive.

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