Exact answer: Few seconds to a few minutes

Mosquitoes are members of the Animalia kingdom. The presence of iron and protein in human blood enhances mosquito egg production. The sucked area of the body becomes swollen. The pain and swelling may last a few seconds or a few minutes.

The duration of itching significantly depends on the climate and the human body. Scientists have discovered more than 3500 species yet.

Mosquitoes have four primary stages of development: egg, larva, pupa, and imago.

Female mosquitoes are primarily responsible for sucking blood from humans. That is why only female mosquitoes bite people to get nourishment and energy. 

What happens if you get bitten by a mosquito?

Mosquitos have a long mouthpart called a proboscis that projects far beyond their heads. It resembles a small needle. When a mosquito bites you, this mouthpart is used to puncture your skin, sucking your blood and secreting saliva into your bloodstream.

What causes mosquito bites to itch?

Many people are bitten by mosquitos every year, yet the effects vary from person to person. When mosquitoes bite, they extract blood while injecting saliva. Their saliva contains proteins as well as an anticoagulant.

Proteins are foreign molecules that activate the immune system. To combat them, the body’s immune system releases histamine, a compound that helps deliver white blood cells to the affected area. Itching, inflammation, and edema are all caused by histamine.

When a person is bitten for the first time, they may not respond. This is because their bodies have not yet developed a response to the foreign invader.

Furthermore, some people may not notice any bites at all. Others may develop tolerance with time.

When an irritant bite appears, knowing which remedies work to relieve the itching is helpful.

Does scratching make it worse?

Irritated caucasian female person with redness on her arm from an Mosquito bite at the park on a summer day. She looks in pain and scratching.

Scratching mosquito bites may aggravate the itching. Mosquito bites itch as a result of inflammation. Scratching an already irritated area worsens inflammation rather than easing itching. This itches the area even more.

Scratching may also raise the risk of infection if the skin is broken. It will be considerably itchier and take longer to heal if the wound becomes infected.

How long do mosquito bites itch?

The itching caused by mosquito bites is excruciating and causes unease. Mosquitoes suck blood from the site of the bite. As a result of the allergic reaction, the affected area swells and itches for some time. The tropical temperature and summer season are prime periods for mosquitoes to bite.

The mosquito’s mouthparts are made up of many tubes. The tube’s role is to slurp blood and transport the saliva into the blood vessel. Mosquitoes use their saliva to smooth the flow of blood. That is why saliva acts as an anticoagulant throughout the process.

Each person’s body reacts differently to a mosquito bite. Some people have large red skin bumps on their skin, while others have little patches with swelling around them. The infused saliva causes redness and irritation.

Swelling and mosquito bites on the person’s upper face might linger for many years. The skin on the face is the most sensitive compared to other body parts. Mosquitoes transmit severe diseases, including the Zika virus, dengue fever, and malaria.

Mosquito bites cause reactions from a few seconds to a few minutes. It may take up to a week for the reactions to subside. Here are the various mosquito bite allergies and their reactions.

Mosquito Bites AllergiesReaction Period
Skeeter SyndromeMore than 24 hours
Systematic ReactionFew hours or Days

Why do mosquito bites itch so long?

The completion of the initial blood meal signals the start of the female mosquitoes’ resting phase. When the guts are full, they start to eliminate proboscis. A peritrophic membrane separates the blood from other stuff in the stomach.

 mosquito bites

Female mosquitoes require blood as a meal to begin the egg development process. Female mosquitos have special mouthparts to swallow blood and other sugary liquids. A mosquito’s saliva has many proteins that are allergic to human bodies.

Soreness and itching are caused by histamine, which is released during the saliva reaction. Histamine is a compound that helps white blood cells reach the damaged area. The human immune system is extremely sensitive to mosquito saliva.

Rubbing or scraping the affected area can aggravate it. Female mosquitoes are stimulated to produce eggs by providing nutrients in human blood. Mosquito bites can cause several life-threatening diseases. Wheal and flare reactions are also included.

There are numerous anti-itching drugs on the market to treat itching. Aside from that, other home remedies might provide quick relief.

Who is at risk of being bitten by mosquitoes?

Mosquitoes bite everyone. However, certain factors may cause mosquito bites. These are some examples:

  • Wearing dark-colored clothing.
  • Visiting a region with active mosquito-transmitted diseases.
  • Blood type.
  • Wearing perfume.
  • Body temperature.
  • Spending time near stagnant water.

How to stop itchy mosquito bites

Kid have insect bites, mother applying antiallergic cream at her son hand with red spot by mosquito bite

Several tried-and-true methods for alleviating the itch of a mosquito bite, such as calamine lotion or hydrocortisone cream. Still, the methods people employ in practice are practically limitless!

Here are a few more home cures for mosquito bite itch:

Don’t scratch

While it may seem logical, the less you scratch the bite, the less it will be irritated and inflamed.


Antihistamines are a common treatment for mosquito bites. Histamine is a compound that your immune system produces. When you are exposed to an allergen, your body produces histamine. Mosquito bites itch due to histamine. An antihistamine can be taken as a pill or applied directly to your mosquito bite as a cream or ointment.


Hydrocortisone is a corticosteroid combined with an anesthetic to reduce pain. It alleviates itchiness and edema. You can apply it immediately to your mosquito bite as a cream or ointment.

Aloe vera gel

Aloe vera is a type of succulent plant. Salicylic acid, found in the gel of its leaves, soothes itching and pain. You can apply aloe gel immediately to the bite of a mosquito.

Chamomile tea

Chamomile tea is made from dried chamomile flowers. Terpenoids and flavonoids are natural compounds with antioxidant and antihistamine properties found in dried chamomile flowers.


Honey contains several anti-itch and anti-pain effects. Honey contains an enzyme known as catalase, which relieves mild inflammation. Apply a thin layer of raw honey to your mosquito bites. You can also place a bandage on your honey-covered bites to avoid making a sticky mess.


Oatmeal includes gluten, which can help relieve itching from mosquito bites. To treat mosquito bites, the best approach to use oatmeal is to grind it into a fine powder (colloidal oatmeal) in a food processor or blender. Mix the oatmeal powder and warm water to make a thick, sticky paste. Apply enough oatmeal paste to your mosquito bites to cover them completely. Wipe away the paste with a clean towel after at least 10 minutes.

Baking Soda Paste

Make a paste with one tablespoon of baking soda and enough water. After 10 minutes, wash off the mixture from the bite.

Cool it Down

An ice bag or cold pack applied to a mosquito bite helps reduce inflammation and hence the itch.

Heat It Up

The exact opposite treatment with the same goal. Heating a bite may also help reduce inflammation and itching. Turn the shower up to the highest you can bear and immerse that bite in hot water.

Primrose Oil

Applying primrose oil to a mosquito bite as a natural remedy can relieve swelling and itching.

Witch Hazel

Another natural option is witch hazel. A dab applied to an inflamed mosquito bite can reduce inflammation and speed recovery.


While it is not recommended to wear outside (since it may attract more bugs), a dab of honey can help ease an irritating bite.

Lime Juice

As an anti-inflammatory, rub a slice of lemon or lime on the affected area.

When should you see a doctor?

Mosquito bites can become infected, causing them to recover more slowly. A person should consult a doctor if they feel they have an infection.

Mosquito bites can cause severe allergic reactions in certain people. Biting these people may result in anaphylactic shock.

Symptoms of this include:

  • facial swelling
  • trouble breathing
  • Hives

If a person has anaphylactic shock, they require immediate medical attention, usually an epinephrine injection via an EpiPen.

Some persons may have the following symptoms as a result of mosquito bites:

  • high fever
  • hives
  • blisters
  • swollen joints
  • lesions

If a person experiences these symptoms, they should consult a doctor. A doctor would often offer over-the-counter antihistamines to address these symptoms in the initial case.

Aedes aegypti or Aedes albopictus mosquito bites are associated with various diseases. Zika, dengue, and chikungunya are among them.

The risk of contracting a disease from a mosquito is low in the United States.

If a person plans a trip to a country where mosquitoes may transmit disease, they should consult their doctor. A doctor can advise you on the best strategy to keep safe and avoid infection.

How can I prevent mosquito bites?

There are several ways to avoid mosquito bites. Among these are:

  • Clearing any standing water.
  • Avoiding travel to affected areas.
  • Using an Environmental Protection Agency-registered bug spray (typically containing DEET).
  • Wearing thick clothes, including long sleeves and long pants. Mosquitoes can bite through flimsy clothing.
  • Installing screens on windows and doors. Use a bug zapper around your house.
  • Staying indoors during the peak of mosquito activity (dusk and dawn).
  • Applying insect repellent chemicals to clothing, tents, and net covers.
  • Sleeping with protective netting.

When visiting a region where mosquito-borne disease is active, it is important to observe safety precautions. It is risky to travel to places where mosquito-borne diseases are active when pregnant.

The Zika virus can harm a fetus if transmitted to a pregnant woman (possibly causing congenital disabilities). Sexual contact can potentially spread the infection. If you’ve been to a Zika-infected area, it’s important to safeguard yourself and your spouse.


There are various methods for reducing the itching caused by a mosquito bite.

Even if you don’t use any of these remedies, the itching will subside. However, if you have other symptoms such as difficulty breathing, edema, or fever. These symptoms point to the necessity for medical attention. Don’t put it off until it becomes a major concern for your health.