Lead Poisoning Symptoms: Recognizing Signs & Seeking Immediate Medical Help

Lead poisoning affects multiple systems. Symptoms correlate with blood lead level (BLL) but can be subtle at low levels (<5 µg/dL).

Symptoms by System

3.5 µg/dL: Reference value (top 2.5% of children) — trigger public health action.
5 µg/dL: Previous reference; confirmatory testing, environmental investigation.
20–44 µg/dL: Medical evaluation, iron therapy, environmental remediation.
45–69 µg/dL: Chelation consideration (succimer/DMSA oral).
>70 µg/dL: Medical emergency; hospitalization, IV chelation (CaNa₂EDTA + DMSA).

Lead paint (pre-1978 housing), contaminated soil, water (lead pipes), imported ceramics, spices, cosmetics, folk remedies, occupational take-home.

If exposure suspected: venous BLL test. Contact local health department for environmental assessment.

System	Signs & Symptoms
Neurological	Headache, irritability, lethargy, cognitive decline, IQ loss, ADHD-like behavior, seizures, encephalopathy (BLL >70–100 µg/dL)
Hematologic	Microcytic hypochromic anemia (↓ heme synthesis), basophilic stippling
GI	Abdominal pain (colic), constipation, anorexia, weight loss
Renal	Proximal tubule dysfunction (Fanconi-like), chronic interstitial nephritis, hypertension
Endocrine	Delayed puberty, reduced growth hormone, vitamin D metabolism disruption
Reproductive	Reduced fertility, miscarriage, preterm birth
Musculoskeletal	Arthralgia, myalgia, reduced bone density