---
title: "Swelling in Your 40s: Causes, Red Flags, and Lab Tests"
description: "Swelling in your 40s often comes from fluid retention, vein valve weakness, or kidney/heart strain. Targeted labs available at Quest—no referral needed."
canonical: "https://www.vitalsvault.com/symptoms/swelling-in-40s"
last-updated: 2026-08-22
---

# Swelling in Your 40s: Causes, Red Flags, and Lab Tests

> Swelling in your 40s often comes from fluid retention, vein valve weakness, or kidney/heart strain. Targeted labs available at Quest—no referral needed.

---

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