If you’re worried that a loved one is using meth, these behavioral, physical and psychological signs & symptoms can help you confirm.

Methamphetamine is a dangerous illicit drug that can affect the body in a number of ways. Being the spouse, parent, friend or loved one of someone using meth can be difficult when you become aware of these effects. Perhaps you’re only familiar with the side effects based on what you see in movies or on television. Knowing the signs of meth use can help you talk to your loved one about getting treatment. It can even save their life.

Article at a Glance:

  • Methamphetamine, or meth, is a Schedule II stimulant that is often trafficked illicitly.
  • Signs a person is on meth can include behavioral changes like psychosis as well as physical signs like premature aging.
  • Meth use is often accompanied by paraphernalia, including needles, spoons and homemade pipes from drinking straws.

What Is Meth?

Methamphetamine, also called meth, is a stimulant drug that is also called street names like crystal meth, chalk, ice or speed. It is a Schedule II controlled substance that is often trafficked illegally in the United States. However, a doctor can also legally prescribe it to treat attention-deficit hyperactivity disorder (ADHD).

As of 2019, about 2 million people annually were using meth. This includes about 1.7 million people aged 26 or older, 275,000 people aged 18 to 25 years, and 41,000 adolescents aged 12 to 17 years.

What Does Meth Look Like?

In most cases, methamphetamine looks like a white crystalline powder. It is also sometimes pressed into a pill form. The drug is odorless with a bitter taste and can dissolve in water or alcohol.

The form of the drug known as crystal meth is shiny, clear or bluish crystals that look like glass fragments or rocks.

Crystal Meth

Crystal meth is a more potent form of meth that tends to be purer and more concentrated than other forms. It is typically smoked, or heated into a liquid then injected. Like other forms of meth, crystal meth is entirely synthetic rather than derived from a plant like many other illicit substances. Making crystal meth is dangerous, as it creates toxic, explosive chemical byproducts.

What Does Crystal Meth Look Like?

Crystal meth earns its name because of its crystal-like physical properties, earning the street name “ice” due to its glass-shard and ice-like appearance. The crystals can be white, clear, blue or a combination of these colors.

Meth Powder

The powdered form of meth may be more common, as it is less potent and potentially less expensive. Powdered meth is most commonly used by snorting it, but can be taken in pill form or dissolved in fluids and ingested.

Producing powdered meth is similar to creating crystal meth — it’s just as dangerous, with the possibility of toxic or explosive chemicals occurring as a byproduct. Powdered meth is often cut, or combined, with other substances. This can either dilute the amount of meth to increase the profit to the dealer or combine the intended effects of meth with other substances.

What Does Meth Powder Look Like?

Powered meth can vary in appearance, but is normally a white or yellowish powder. It is usually impossible to tell powdered meth apart from other drugs that are in powdered form. It is also difficult or impossible to tell if other substances have been added to powdered meth.

Liquid Meth

Meth is normally used in its solid crystal or powder forms, but can be turned into a liquid for transportation. In this process, powdered meth is dissolved in water, then transported. To prepare the meth for use, the water is boiled off, leaving just the powdered form.

Liquid meth can also be injected as-is. It is normally prepared in a spoon or a similar utensil then drawn into a syringe.

What Does Liquid Meth Look Like?

Liquid meth is usually a clear liquid, but it may have a tinge of color depending on its purity, and whether or not it was cut with other substances. It is typically difficult to tell if a liquid contains meth just by looking at it.

How Is Meth Used?

Meth comes in different forms and can be taken several different ways, including snorting, injecting, consuming orally or smoking it. Crystal meth is most commonly smoked. In a recent study of current and former meth use, 63% of people smoked meth, 44% snorted meth, 27% injected meth and 30% swallowed it. Nearly half of all people who use meth consume it with multiple methods, and 7% use all four methods over their lifetime.

When meth is first used, it creates an immediate rush. That rush lasts up to 30 minutes and is described as extremely pleasurable. Following the initial rush, a meth high can last for up to 14 hours. The onset and length of the high vary based on how it is taken.

According to our 2021 survey of former and current meth use, meth use tends to be frequent. In fact, 44.4% of respondents use or used meth daily and 22.9% use or used it several times per week.

Common Signs Someone Is On or Using Meth

People on meth typically exhibit certain physical signs. If you’re wondering how to tell if someone is using meth, symptoms can include being energized or physically active, and a reduced appetite.

Look For Meth Paraphernalia

Paraphernalia includes accessories that people use when taking drugs. Some types of paraphernalia are used for multiple types of drugs. Common paraphernalia linked to meth include:

  • Needles
  • Syringes
  • Spoons, often with burn marks on the bottom from being heated
  • Cotton balls
  • Butane lighters
  • Tinfoil
  • Small glass or metal pipes
  • Plastic pen casings
  • Drinking straws
  • Small mirrors
  • Razor blades
  • Plastic cards, such as credit cards, for breaking up the substance
  • Rolled paper, such as dollar bills, to snort the powdered substance

If you suspect someone may be cooking meth, there are telltale signs to identify a meth lab. Outside, you may see blacked-out windows or smell unusual odors, and signs inside can include the appearance of funnels and lab equipment. Be aware of the physical effects that can come with cooking meth, including asthma, insomnia or tremors.

If you come across a meth lab, do not approach it. Protect yourself and others by leaving immediately and alerting law enforcement.

Behavioral Signs of Meth Use

If a loved one is struggling with meth, you may notice some of the drug’s side effects. Some behavioral signs that a person is using meth include:

  • Dilated pupils
  • High blood pressure
  • Elevated body temperature and heart rate
  • Shortness of breath
  • Grinding of teeth
  • Being very alert or physically active
  • Reduced appetite and weight loss
  • Outbursts or mood swings
  • Paranoia or hallucinations

In a survey by The Recovery Village, people who currently and formerly used meth reported symptoms that lasted long-term, even after they stopped using meth. 23% reported high blood pressure, 27% reported sudden or severe weight loss and 16% reported hallucinations. People who utilized multiple methods doubled their chances of experiencing weight loss and hallucinations.

Physical Signs of Meth Use

Methamphetamine is a dangerous and highly addictive drug, and its signs of use are among the most recognizable of all substances. Some of the most common signs of meth use are apparent in the person’s appearance. Crystal meth can dramatically impact the user’s looks and give them certain distinctive characteristics. Roughly 37% of people who use or used meth report a significant impact on their appearance.

Some visible meth symptoms can include:

Visible signs are less common than you’d think, so just because someone isn’t exhibiting these signs doesn’t mean they aren’t using meth. One in three people who use or have used meth reported meth mouth or broken teeth, and 31% reported sores, abscesses or infections on their skin from scratching.

However, these signs are more common among people who report heavy meth use. People who use meth heavily are four times more likely to experience meth mouth and two times more likely to have sores or infections.

The method of use also plays a part in physical signs of use. In our surveypeople who smoked meth were three times more likely to get meth mouth, while those who snorted it were 2.5 times more likely to have nasal damage. Those who injected meth were three times more likely to have sores or infections on their skin.

A combination of particular visible signs and matching paraphernalia — sores and a needle or syringe, for example — is a telling indicator.

Related Topic: Starting Treatment with Online Rehab

What Is Tweaking?

“Tweaking” is another element that can help determine whether or not someone is using crystal meth. Tweaking occurs at the end of a drug binge when the person using can’t achieve a rush or high anymore, struggles to achieve feelings of euphoria from meth and is often left with intense cravings and a sense of desperation.

Some additional signs of tweaking can include:

  • Feeling like bugs are crawling under the skin
  • Being unable to sleep for days
  • Being in a psychotic state or completely disconnected from reality
  • Growing increasingly frustrated, paranoid and unstable
  • Experiencing hallucinations
  • Self-harm
  • Strong cravings for meth

What Is a Tweaker?

A “tweaker” is a slang name for someone who uses meth and comes from the term “tweaking”. While calling someone a tweaker may be used to refer to tweaking specifically, it can also refer to someone in the context of their meth use in general.

The Crash

Another sign someone is using crystal meth is the crash phase. During this period, the person’s body collapses after the constant stimulation from meth, usually ending in long periods of sleep. A crash can last anywhere from one to three days, and it can be an outward sign of meth use that’s apparent to people around the user.

Meth Withdrawal Signs

If someone with a meth use disorder suddenly stops using it, signs of withdrawal may be apparent. Withdrawal from meth can cause mental symptoms, particularly in those who have used the drug long-term. Along with intense cravings, signs of withdrawal can include anxiety, fatigue, headaches and depression.

Headaches are the most common meth withdrawal symptom, occurring in 63% of people who use meth, followed by fatigue in 57%, sleep problems in 52%, and depression and anxiety in 41%.

Remember that these withdrawal symptoms are also associated with many other medical conditions and should not be considered a sign of meth use on their own. They should instead reinforce other visible signs and behaviors associated with meth use.

Recognize the Signs of Meth Use So You Can Prevent the Damaging Effects

Meth can have damaging effects on the user, both physically and psychologically, including:

  • Changes in brain structure and function
  • Deficits in thinking and motor skills
  • Severe dental problems
  • Psychosis
  • Aggressive or violent behavior
  • Heart or brain damage from the stress meth causes on the body

Some neurobiological effects could be partially reversible, but it’s important to address meth use as early as possible to prevent any long-term effects and increase the chances of successful treatment.

Taking the Next Step

If you recognize the signs of meth use, you should seek help from a medical professional or professional rehab treatment program. Someone who is using meth can not only harm themselves but can be a danger to people around them.

If you or a loved one are struggling with a meth addiction, The Recovery Village can help. Calls are free and confidential, so pick up the phone and start the road to recovery today.

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Editor – Melissa Carmona
Melissa Carmona puts years of writing and editing experience to work helping people understand substance abuse, addiction and mental health disorders. Read more
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Medically Reviewed By – Dr. Jessica Pyhtila, PharmD
Dr. Jessica Pyhtila is a Clinical Pharmacy Specialist based in Baltimore, Maryland with practice sites in inpatient palliative care and outpatient primary care at the Department of Veteran Affairs. Read more

U.S. Department of Justice Drug Enforcement Administration (DEA). “Drugs of Abuse.” 2020. Accessed April 11, 2021.

McCance-Katz, EF. “The National Survey on Drug Use and Health: 2019.” Substance Abuse and Mental Health Administration (SAMHSA), September 2020. Accessed April 11, 2021.

Foundation for a Drug-Free World. “The Truth About Crystal Meth and Methamphetamine.” Accessed April 11, 2021.

U.S. Department of Justice. “Crystal Methamphetamine Fast Facts.” National Drug Intelligence Center. Accessed February 9, 2022.

The State of Nevada. “Forms of Meth.” Nevada Attorney General Aaron D. Ford. Accessed February 9, 2022.

U.S. Department of Justice Archive (USDOJ). “Meth Awareness In The News.” 2021. Accessed February 9, 2022.

The University of Arizona. “Liquid.” MethOIDE: methamphetamine and other illicit drug education. Accessed February 9, 2022.

National Institute on Drug Abuse. “What are the long-term effects of methamphetamine misuse?” Methamphetamine Research Report, October 2019. Accessed February 9, 2022.

Medical Disclaimer

The Recovery Village aims to improve the quality of life for people struggling with substance use or mental health disorder with fact-based content about the nature of behavioral health conditions, treatment options and their related outcomes. We publish material that is researched, cited, edited and reviewed by licensed medical professionals. The information we provide is not intended to be a substitute for professional medical advice, diagnosis or treatment. It should not be used in place of the advice of your physician or other qualified healthcare providers.