Mosquitoes were the first thing I thought of, but I have never seen single spots, they are always grouped together, forming a curved line. I immediately had an unkind assumption about crawling parasites. Only first it is necessary to understand how quickly bed bug bites appear in humans, how they look on a person. Then it will be possible to diagnose, and begin treatment. Help me understand the signs of different insect bites, primarily interested in bed bugs. Thank you.
The author of the portal answers the question:
What do domestic bed bug bites look like on the human body: physiology of the bite, marks on the human body
At such insects mouth apparatus of the stabbing-sucking type. It helps to make a piercing, because a thin proboscis of considerable length is provided, and there is a sharp part on its end. When bedbugs appear at home, the bites are made by making rotating movements of the protruding part. The sharp part of the mouthpiece is then inserted.
The blood enters the body parasites through one of the two channels that run through the proboscis. The second of these allows the injection of an anesthetic substance, which resembles an anesthetic in its properties. This has an effect on the person's well-being. But this possibility for the parasites appeared not because they care about their victim, but because of the need to create conditions for a quiet meal.
The effect of the anesthetic wears off after 15-20 minutes. Then the bite symptoms appear bedbugs on the human body.
У larvae This is not possible, their body is developing, not all functions are active yet. If bitten by bed bugs that are at an early stage of development, unpleasant symptoms will appear as soon as the insect inserts its proboscis under the skin. And the peak of activity is observed when larvae emerge from their eggs. They need food to move on to the next stage of development.
You need to understand how a bed bug bites. So, it makes several punctures. Sometimes up to 7-8 spots appear on a person, but more often there are 2-5 spots where you can see the traces of the parasite attack. The reason for this behavior is the need to get a certain amount of food. In addition, bedwetting parasites do not always enter the blood vessel immediately.
If you wonder how bed bugs bite, you need to pay attention to the location of the spots - they form a track, because the pest after extracting the trunk slightly shifts relative to the first puncture, repeats the action.
Bloodsuckers parasites feed at night. This is due to light phobia. Thus, insects are inactive during the day, they do not tolerate natural light well. In addition, parasites move slowly (1 m in 1 minute), they need to create safe conditions for the time of eating. For this reason, the bedbug bites after midnight, closer to dawn (from 2 to 5 a.m.). The likelihood of being crushed at this time is low. However, the risk of death is still present because a person can change body position while sleeping.
What are the favorite places for bed bug bites
Parasites will attack on areas free of clothing. During the warm season, bed bug bites are found all over the body:
- upper and lower extremities;
The localization of hyperemic spots is determined by the position of the host's body while sleeping. In winter, bed bugs have fewer opportunities to attack: they bite where they have to (where they find open areas):
Sometimes bedbugs crawl under clothes, but in doing so they run a great risk of dying, because after eating the body enlarges several times. Where the parasite crawled in a hungry state, it will not get out if it gets a portion of food. Clothing can crush the parasite. When a person changes body position, the bedbug is also in danger of being killed.
Given that parasites prefer to live in conditions of maximum safety, they will not commit acts that will lead to death.
In addition, the insects prefer to choose areas where the skin is thinner and blood vessels are closer. Bed parasites at the initial stage of development (larvae, nymphs) do not yet have the same capabilities as adults. They need a more accessible source of food.
Larvae bedbugs other species attack small animals (in nature) at the first stage of development. Humans are bitten by adults because their mouthparts have become powerful enough to do so. Bed bugs do the same, but there is no such choice in human dwellings, so they have to look for a more suitable area of the outer covers.
This is another reason explaining why bedbugs bite several times.
Close-up photos of bed bug bites on the human body
- when the trunk is inserted, the human body reacts in its own way to the introduction of a foreign object, resulting in a red spot, its size may be different, which depends on the level of sensitivity of the victim, so it is difficult to say exactly how a bedbug bite looks like in humans (the diameter of the area with redness varies from 1-5 mm to 5 cm);
- often you can see baked blood in the center, it is released when the parasite extracts the proboscis, but the amount of biological fluid is so small that you can see only a dark red dot;
- Instead of dripping blood, in some cases there is a noticeable depression, which is more pronounced against the background of swelling.
Signs and symptoms of bed bug bites
Not everyone is affected. If you are bitten by a bedbug, in most cases you will experience symptoms:
- Swelling - can be stronger or weaker;
- itching, and it is so intense that it is often impossible to tolerate the discomfort, in children this symptom is more pronounced;
- painful sensations - a sign that is not characteristic of these insect bites, but occurs when the body is hypersensitive (due to swelling).
If you pay attention to how you feel or what you see in each individual bite, it's difficult to tell what kind of pest is attacking, because similar symptoms occur after contact with different insects. What distinguishes a bedbug bite is the location of the hyperemic areas - in the form of a track. But this band does not always run in a straight line. Its direction is determined by the behavior of the bed bug.
Sometimes such a path is zigzagging.
When and whom bed bugs bite most often
Insects attack mainly at night. This is due to the peculiarities of their life activity. For example, pests do not tolerate daylight and bite at night. However, under certain conditions, bed bugs can attack people during the day. This happens when there are problems with access to a food source.
Blood-sucking parasites from hunger seek alternative sources of food: animals, birds. However, this is not always possible in an apartment. For this reason, the answer to the question whether bed bugs bite during the day is positive. The parasites get up to a person, even if it is still light outside the window. But even here, they may be unsuccessful, because the potential victim of a bedbug is constantly moving around.
In order for the insect to get a portion of food, you must wait until the person is resting.
At the same time, blood-sucking pests attack different people, they do not distinguish between them, because the target is blood: of any group, properties, composition. Insects do not pay attention to these parameters. Sometimes it seems that bites from bed bugs are found on the body of some people and others are not. However, this is not the case. In fact, pests can bite those who get in their way (the victim sleeps on the bed closest to the parasite).
But not all bites look familiar: with hyperemia, swelling. Some people do not react to the puncture and the introduction of the secretion by the parasite. As a result, no symptoms appear. A bedbug bite goes unnoticed. But the reason for the absence of traces of the attack is also another reason:
- people with a high blood alcohol content have less bites, but this is not due to the composition of the biological fluid, but to the developed sense of smell of insects;
- traces of a bug bite are more often found in people with sensitive, more delicate skin (e.g., women, children).
How to protect yourself from bites
If there is a risk of negative manifestations, you should protect yourself from the parasites if possible. When bed bugs bite people, take action:
- set the legs of the bed in a container of water, and the inner walls of the bed are oiled to prevent the insects from escaping from the trap: when the parasite rushes to a person, it will not be able to overcome this obstacle, but this method helps to remove bed bugs, provided that the insects do not live inside the bed / couch;
- The sleeping place should be moved away from the wall;
- if there is a fear that vermin will enter the bed through the ceiling (climb the wall, and then fall directly on the person), you should install a canopy, and its edges should not fall to the floor;
- put strong smelling agents inside the construction of the bed/sofa: cotton disks with applied essential oil, wormwood, lavender, vinegar treat hard surfaces;
- The outer walls of the sleeping place are treated with a solid insecticide, but this method does not provide immediate results, and therefore it should be applied 1-2 days before the day when you plan to sleep in the infested apartment.
Is a bedbug bite dangerous for humans
After the attack, it is recommended to treat the injured skin.
This will prevent secondary infections. Bacteria can get into the wound, especially if there are already scratches because of the intense itching. This is one of the dangers of bed bugs, the bite can be painful, cause allergies, and form lumps on the skin. This is a consequence of the parasite introducing a special secretion.
You need to know what else a bedbug bite is dangerous for. For example, many people believe that these parasites are a source of disease. They do carry pathogenic particles. But bed parasites can not pass them to a person when bitten. This is explained by the peculiarities of the structure of the digestive tract and mouth of the pest. If you are wondering if a bed bug bite is dangerous for humans, you need to understand that blood enters the esophagus during feeding.
Once the biological fluid ends up in the digestive tract, it can no longer return the same way back. This is nature's way of protecting the parasite host, which allows the insects to survive.
When bedbug inserting its proboscis, it injects saliva under the skin, but it does not contain those pathogens that entered its body through the victim's blood. This means that the question of how dangerous a bedbug bite is is not about the pest's eating habits. In theory, the risk of contracting hepatitis, tularemia and other diseases is present. This is explained by the fact that when you injure the body of a fed bedbug, there is a risk of infected blood entering the wound on the damaged human skin.
Why bed bug bites itch. Manifestations of allergies
When the integrity of the outer covering of the host is broken, the parasite introduces a special substance into the host's body with its saliva. It is upon contact with it that various reactions appear: itching, swelling. Such symptoms are found in 30% people who have been bitten by bedbugs, what to do in this case: if the signs are expressed weakly, you can do nothing, in the case when itching and unpleasant sensations intensify, prescribe symptomatic treatment.
Still, it is better not to ignore even mild redness and itching, treating the bite sites with a specialized product, such as ointment GEKTOR.
There is also the possibility of developing severe allergies. In this case there are signs:
- the hyperemic area increases significantly;
- breathing is impaired;
- Quincke's edema develops.
But such reactions can develop with multiple bites if the person has a tendency to allergies.
How long does it take for a bedbug bite to go away?
When attacked parasitesIt is not easy to predict the disappearance of traces of the attack. If you wonder how long a bedbug bite lasts, take into account whether the victim is prone to developing allergies, whether there are other diseases.
The condition of the wound that the parasite leaves also plays a role. For example, a person begins to scratch the skin when it itches a lot. The scratches look like scratches. In this place, inflammation can develop if a bacterial infection joins. Depending on the depth of the soft tissue affected, the rate of skin recovery is determined. Sometimes small scars remain in the place where the bites appear.
In most cases, such marks go away without consequences. Under normal conditions, it takes a few days. If you are wondering how long it takes for bed bug bites to go away in cases where inflammation or allergies develop, you should know that it can take from a few days to 1-2 weeks, and sometimes longer, to recover.
If there is a bite in the morning bedbug or several traces of an attack, it is advisable to wash the area immediately under running water with soap and water. This will allow the skin to be cleaned of impurities, thus reducing the risk of secondary infection. Next steps:
- Treat bites with alcohol-containing products (marigold tincture, rubbing alcohol, vodka). You can buy remedies at a drugstore or make your own. Wash plants (calendula, plantain or other plant with anti-inflammatory properties), pour alcohol in a 1:1 ratio, after 2-3 days, strain and apply as directed.
- If there is a risk of attack by blood-sucking insects, you need to know in advance what to do when bitten