---
title: "hCG side effects: common vs serious risks"
description: "hCG side effects may include headache, mood changes, swelling, and injection-site reactions. Rarely, blood clots or severe allergy, after clinician review."
canonical: "https://www.vitalsvault.com/treatment-learn/hcg-side-effects"
last-updated: 2026-08-22
---

# hCG side effects: common vs serious risks

> hCG side effects may include headache, mood changes, swelling, and injection-site reactions. Rarely, blood clots or severe allergy, after clinician review.

---

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