Yes, keeping naphthalene balls (mothballs) near where you sleep is harmful to your health.
Naphthalene slowly converts from a solid into a gas through sublimation.
Short-Term Effects
Respiratory & Sensory Irritation: Eye burning, nasal congestion, throat irritation, and coughing.
Neurological & Digestive Issues: Headaches, dizziness, nausea, and fatigue caused by inhaling the fumes for several hours.
Long-Term & Serious Health Risks
Red Blood Cell Damage (Hemolytic Anemia): Prolonged or heavy inhalation can cause red blood cells to break down, impairing oxygen delivery throughout the body.
This risk is significantly higher in individuals with G6PD deficiency. Organ Stress: Chronic exposure places toxic strain on liver and kidney function.
Carcinogenicity: Major health organizations (including the EPA and WHO/IARC) classify naphthalene as a possible human carcinogen.
Safe Usage Guidelines
Never use in open living/sleeping areas: Mothballs are registered pesticides intended exclusively for tightly sealed, airtight containers (such as sealed plastic storage bins or garment bags) to kill fabric pests.
Airtight Storage Only: When retrieving clothes stored with mothballs, air them out thoroughly outdoors and wash them before use.
Safer Alternatives: For insect repellent or odor control near sleeping spaces, switch to natural cedar wood blocks, dried lavender sachets, or pure camphor.