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Formication - A Tactile Hallucination

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Formication is a condition characterized by hallucinating sensations of insects crawling inside or beneath the skin. Read the article for more information.

Medically reviewed by

Dr. Ramchandra Lamba

Published At April 5, 2023
Reviewed AtJune 8, 2023

What Does It Mean by Formication?

The sensation of insects crawling across or beneath the skin is known as formication. The Latin word "formica," which means ant, is the source of the name.

Paresthesia is a type of formication. When a person experiences sensations on their skin that have no physical cause, they have paresthesia. There are numerous types of paresthesia. Burning, tingling, or numbness are all examples. Affected individuals may also refer to the "crawling" sensation as "pins and needles" during formication.

Tactile hallucination is another name for formication. This indicates experiencing a sensation without a physical cause. To process signals from the tactile sense, also known as the sense of touch, certain brain regions collaborate. When brain regions behave as if they are processing signals from the body despite the absence of such signals, this condition is known as tactile hallucination. Since the brain is behaving like it is getting signals, these hallucinations feel totally genuine. They may make it difficult for someone who struggles with these hallucinations to distinguish between what is real and what is not. Individuals who experience these hallucinations frequently feel a quick and, surprisingly, wild desire to scratch or pick at the area of skin impacted.

Formication can indicate a number of conditions. Parkinson's disease and fibromyalgia are two examples of these conditions. Formication can also occur when a person stops drinking or using drugs.

What Are the Symptoms of Formication?

The sensation of bugs crawling on or beneath the skin is the most common symptom of formication. The person also feels itchy as a result of this feeling. Even if there is no actual cause of the itch, this may cause them to scratch the area of their skin where they feel it.

Skin damage and open cuts can result from persistent scratching or picking to alleviate an itchy sensation. Other conditions, such as skin ulcers or open wounds, can develop from these open cuts if they become infected. Also, formication is most common at night.

Depending on the underlying cause, formication may occur simultaneously with other symptoms. Other signs and symptoms include:

  • Pain experienced throughout the body.

  • Feeling of exhaustion.

  • Feeling stiff.

  • Trouble concentrating (frequently called "fibro fog" on account of fibromyalgia).

  • Tremors or hand or finger shaking.

  • Slowing down over time (bradykinesia).

  • Feeling of depression.

  • Being agitated or enraged.

What Causes Formication?

Formication can be caused by the following conditions:

  • Parkinson’s disease (a condition that affects movement, often resulting in tremors, that affects the central nervous system).

  • Fibromyalgia (widespread tenderness and pain in the muscles).

  • Anxiety (a feeling of dread, fear, and uneasiness).

  • Diabetic neuropathy (a kind of nerve damage that diabetes can cause).

  • Herpes zoster (an acute, cutaneous viral infection characterized by a painful rash brought on by the reactivation of the varicella-zoster virus).

  • Lyme disease (a disease spread by ticks and brought on by the bacteria Borrelia burgdorferi, characterized by fever, headache, and skin rash).

  • Cutaneous squamous cell carcinoma (skin cancer, which can manifest as an open sore, a firm red bump, a scaly red patch, or a wart that can crust or bleed easily, or a scaly red patch).

  • Perimenopause (refers to the natural transition towards the end of reproductive years, when the body enters menopause).

  • Formication can also be brought on by alcohol withdrawal, also known as delirium tremens.

Formication can indicate either recreational or prescription drug use. Formication can also result from withdrawal following the cessation of the use of certain drugs. Some of these drugs are:

  • Eszopiclone - Prescription sedative-hypnotic medication used for the treatment of insomnia.

  • Methylphenidate - Central nervous system stimulant used to treat attention deficit hyperactivity disorder (ADHD).

  • Bupropion - Antidepressant prescription medication also used for smoking cessation.

  • Ecstasy - 3,4-methylenedioxy-methamphetamine or MDMA (stimulant drug causing hallucinations).

  • Cocaine - Central nervous system stimulant.

  • Crystal Meth - Highly addictive drug that causes potent stimulation of the central nervous system.

How Is Formication Diagnosed?

During the appointment, the doctor will ask about the following:

  • Any additional symptoms being noticed along with formication.

  • What time of the day are the crawling sensations most pronounced?

  • Any additional medications that the person may be taking and whether they noticed any symptoms after starting those medications.

  • Usage of any recreational psychoactive substances.

By providing the doctor with a complete picture of the symptoms, one can help them identify additional symptoms of

  • Any underlying condition.

  • An adverse reaction to medication.

  • Complications from using certain drugs.

Scabies-like symptoms are shared by formication. This condition occurs when eggs laid by tiny mites burrow into the skin. The doctor must look for signs that may indicate that the symptoms are not caused by actual insects.

How to Treat Formication?

Depending on the cause, treating formication can take many different forms.

When a Medical Condition Causes Formication?

Treatment for formication depends on the cause. Fibromyalgia, diabetic neuropathy, and Parkinson's disease may necessitate a long-term treatment strategy to manage symptoms and complications. Formication caused by skin cancer may be treated with radiation therapy.

In some instances, an antihistamine like Cetirizine or Diphenhydramine can help alleviate the crawling sensation. To avoid severe itching episodes, it is recommended to take these as soon as the sensation begins.

When Formication Occurs Due to Prescription or Recreational Drugs?

If taking prescription or recreational drugs is the cause of formication, quitting that drug may help to get rid of it completely. However, discontinuing prescription medication without first consulting a physician is not recommended. In the event that the prescribed medication is for a different condition, they might suggest an alternative that does not cause side effects.

Addiction to drugs like cocaine and meth can be treated with rehabilitation. There are numerous drug addiction support groups. These can give the person a place to share their experiences as they stop using drugs.

Conclusion

Formication is a sign of a problem that lies beneath the surface and can be fixed. Certain medications and abstinence from recreational drug use typically aid in eliminating this crawling sensation completely. If a person experiences recurring episodes of formication, it is best to see a doctor. They can come up with a diagnosis and a treatment plan that might be able to get rid of the feeling completely.

Frequently Asked Questions

1.

Is Formication a Serious Issue?

Formication, the sensation of insects crawling on or under the skin, can be a disturbing and distressing experience. While it is often associated with various underlying medical or psychological conditions, its seriousness depends on the underlying cause and its impact on an individual's quality of life.

2.

What Methods Help People Eliminate Formication?

Eliminate formication typically involves seeking medical evaluation to identify the specific reason for the sensation. Treatment may vary widely depending on the cause, including addressing infections, neuropathy, medication adjustments, or psychological factors. Lifestyle changes, topical soothing treatments, and support from healthcare professionals or support groups can complement the treatment plan, aiming to alleviate the discomfort and distress associated with formication.

3.

Does Formication Stem from Nerve Problems?

Formication can stem from nerve problems. Conditions like neuropathy, multiple sclerosis, vitamin deficiencies, certain medications, and various neurological disorders can disrupt normal nerve function and lead to abnormal sensations, including formication.

4.

Why Do Formication Episodes Occur Primarily at Night?

Formication episodes often occur primarily at night due to a combination of factors. During nighttime, when the environment is quieter, and people are more relaxed and less distracted, individuals may become more aware of subtle sensations like the crawling or tingling feeling associated with formication.

5.

Is There an Alternative Term for Formication?

The alternative term for formication is sometimes referred to as paresthesia or tactile hallucination. Paresthesia is a more general term that encompasses abnormal sensations like tingling, prickling, or numbness, which can include the sensation of insects crawling. Tactile hallucination refers to perceiving touch or tactile sensations without external stimulus.

6.

How Is Formication Related to Drug Use?

Formication can be related to drug use in several ways. It may manifest as a side effect of certain drugs, especially stimulants or psychoactive substances, leading to the sensation of insects crawling on or under the skin. Additionally, substance abuse, particularly of drugs like Methamphetamine or cocaine, can exacerbate the perception of formication as part of delusional parasitosis, a condition in which users believe they are infested with parasites or insects. Withdrawal from drugs can also trigger this sensation.

7.

Can Formication Be a Symptom of Menopause?

Formication is one of the less common but reported symptoms of menopause. These sensations are often related to hormonal fluctuations and can contribute to the overall discomfort experienced during this life stage. While not all women going through menopause will experience formication, it can occur in some cases and is typically linked to hormonal changes and imbalances.

8.

Which Hormonal Imbalance Leads to Formication?

Formication can be associated with various hormonal imbalances. One of the most common hormonal imbalances leading to formication is a decrease in estrogen levels, particularly during menopause or perimenopause. Other hormonal imbalances, such as those related to thyroid disorders or conditions like polycystic ovary syndrome (PCOS) or adrenal gland disorders, can also potentially contribute to formication.

9.

Can Birth Control Contribute to Formication?

Birth control methods, including oral contraceptives, are generally not known to contribute directly to formication. These contraceptives work by regulating hormonal levels, primarily through the control of estrogen and progestin, to prevent pregnancy. However, some individuals may experience side effects or sensitivities to the hormonal changes introduced by birth control.

10.

Does Neuropathy Play a Role in Formication?

Neuropathy can play a significant role in the development of formication. Neuropathy is a condition that affects the nerves, often leading to various sensory abnormalities, including tingling, burning, or crawling sensations on or under the skin. This is because neuropathy can disrupt the normal functioning of the peripheral nerves, which are responsible for conveying sensory information to the brain.

11.

Can Anxiety Induce Sensations of Skin Crawling?

Anxiety can induce sensations of skin crawling. Anxiety and stress can have an impact on the body, including the nervous system, which can lead to various physical sensations and symptoms. Skin crawling, tingling, or other unusual skin sensations are sometimes reported by individuals experiencing high levels of anxiety.

12.

What Does Psychology Say About Formication?

In psychology, formication refers to a tactile hallucination or sensory abnormality in which an individual perceives the sensation of insects, bugs, or parasites crawling on or under their skin when, in reality, there are no such creatures present. This phenomenon can be a part of various psychological and psychiatric conditions, including substance-induced disorders, delusional parasitosis, or somatic symptom disorders. It is considered a form of paresthesia, which encompasses abnormal sensations like tingling, numbness, or burning, and the sensation of crawling insects.

13.

What Sets Formication Apart from Parasitosis?

Formication and parasitosis are related phenomena involving the perception of insects or parasites crawling on or under the skin, but they differ significantly. Formication is a sensory abnormality where individuals feel these sensations without a fixed delusional belief in infestation. It can have various underlying causes, including medical and non-medical factors. Parasitosis, or delusional parasitosis, is characterized by a steadfast delusional belief in infestation, typically considered a psychiatric condition resistant to contrary evidence.

14.

What Measures Can People Take to Halt Formication?

Individuals should address the underlying cause and alleviate associated symptoms to stop formication. A thorough medical evaluation is crucial to identify the specific reason for the sensation. Treatment varies depending on the cause, including addressing infections, neuropathy, medication adjustments, or psychological factors. Good hygiene practices and stress management can complement medical interventions.

15.

Are There Any Significant Risks Associated with Formication?

Formication itself is not typically a life-threatening condition, but it can be indicative of underlying medical or psychological issues, some of which may carry risks. Without treatment for the underlying cause, formication can increase the risk of delayed diagnosis and complications. For example, if formication is related to neuropathy, failing to address the nerve damage could lead to impaired mobility and quality of life. In cases where formication results from psychological factors, unmanaged stress or anxiety may contribute to mental health concerns.

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Dr. Ramchandra Lamba
Dr. Ramchandra Lamba

Psychiatry

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