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Pesticide Exposure Symptoms

Pesticide exposure does not look the same every time. This guide explains in general terms why symptoms vary and why you should seek help early, and it sends you to official health sources for medical detail.

Why is it hard to recognize pesticide exposure?

Symptoms depend on the product, the amount, the route of exposure and the person. Some effects appear within minutes, others take hours, and some resemble the flu, heat illness or a common stomach bug. Because of that overlap, exposure is often missed, particularly during a busy work season.

Official health sources describe symptoms for particular classes of products. This site does not diagnose or list medical thresholds. If you work with pesticides and feel unwell, say so to a health professional.

Keep a short note of when symptoms started and what you had been doing, such as mixing, spraying, cleaning equipment or entering a treated field. Clinicians find timing and activity useful.

How can exposure happen?

Pesticides can enter the body through the skin, through the eyes, by breathing vapors or dust and by swallowing. Skin contact is a frequent route for handlers, while bystanders may be exposed through drift or by entering treated areas too soon.

Children can be exposed by touching treated surfaces and then putting hands in their mouths. Clothing carrying residue can expose family members at home.

Pets and livestock can be exposed too. If an animal behaves unusually after being in a treated area, call your veterinarian and tell them the product name.

• Skin and eyes
• Breathing
• Swallowing
• Residue on clothes, tools and surfaces

What kinds of signs are generally described?

Health agencies describe a range of general signs of possible poisoning, including irritation of skin or eyes, feeling sick to the stomach, headache, dizziness, unusual tiredness or weakness and trouble breathing. More serious signs include confusion, fainting or seizures.

These signs can have many causes, so do not try to sort them out yourself. Follow the label and poison specialists, and check the CDC and NIOSH sites for accurate details.

Heat illness and pesticide exposure can look alike in a hot field, and protective gear can add to heat stress. When in doubt, treat the situation as serious and seek advice instead of assuming it is only heat.

When should I act?

Treat any suspected exposure seriously, especially if the person is a child, is confused, is having trouble breathing or has collapsed. Call 911 in an emergency. In the United States, poison specialists can be reached through the official Poison Help line listed by America's Poison Centers.

Do not wait to see if symptoms become worse. Do not give food, drink or home remedies unless the label or a professional instructs it.

• Call 911 in an emergency.
• Use the Poison Help line for advice.
• Keep the label and container details ready.

What information should I have ready?

Bring or have nearby the product label and the container, if you can do so safely. Poison specialists and responders will want the name, registration information, how the person was exposed and when. The label's first aid section is the source for what to do before help arrives.

Write down the time, what happened and any symptoms. This helps clinicians and may be needed for later reports.

Keep a copy of safety data sheets in the truck and shop as well as the office. The more places they are stored, the more likely they are to be at hand when needed.

What about repeated low-level exposure?

Some people experience symptoms after working with pesticides day after day, without an obvious spill. Do not dismiss a pattern of headaches, rashes or breathing problems that shows up during spray season. Tell a health provider about your work, the products and the tasks.

Occupational health clinics and agencies such as AgriSafe can help you review your habits and equipment and spot gaps.

• Headaches or rashes that return each spray season
• Breathing problems that appear after certain tasks
• Tiredness that seems tied to work with chemicals

How can I support coworkers and family?

Check on each other during and after application. Encourage people to speak up early, without teasing or blame. Keep emergency numbers visible. A culture where people feel safe saying they feel unwell prevents more serious problems.

Share information with workers in languages they understand, so that nobody hesitates because of a language barrier.

Make sure that new hires and seasonal workers learn the signs of trouble on their first day, not weeks into the season.

Last reviewed: November 12, 2026. Written by the Farm Safety Editorial Team. See our editorial policy.