NEW YORK (CBSDFW.COM/AP) — Lin-Manuel Miranda thought he had a migraine. It turns out the Broadway star really had shingles.

Miranda tweeted on Thursday the diagnosis was caught early, but he’s been quarantined from his 8-week-old son. He jokingly said his ophthalmologist had blurred his eyes and he’s wearing a mask and posted a “Phantom of the Opera” gif.

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He later explained more on Twitter saying, “Not wearing a mask. My eyes are fine, they were just dilated for the checkup, which is routine. Staying at my folks’ house, up the street.”

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Miranda’s son, Francisco, was born in February. He also has a 3-year-old son, Sebastian.

The 38-year-old wrote the book, music and lyrics and starred in the Broadway smash “Hamilton.”

Shingles is a viral disease that causes a painful rash that is usually resolved within days or weeks.

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(© Copyright 2018 CBS Broadcasting Inc. All Rights Reserved. The Associated Press contributed to this report.)