Why shouldn't you scratch after a mosquito bite?

Feb 06, 2025 Source: Cainiu Health

Dr. Liu Wenmin

Introduction

The reasons why one should not scratch after a mosquito bite include exacerbating skin inflammation, triggering infections, leaving scars, spreading viruses, and prolonging the healing process. After being bitten by a mosquito, scratching should be avoided as much as possible. Instead, measures such as applying a cold compress or using anti-itch creams can be taken to relieve itching and swelling. If abnormal symptoms occur at the bite site, such as expanding redness and swelling, fever, or increasing pain, prompt medical attention should be sought.

Generally speaking, the reasons why one should not scratch after a mosquito bite include aggravating skin inflammation, causing infections, leaving scars, spreading viruses, and prolonging recovery time. Detailed explanations are as follows:

　　1. Aggravating skin inflammation: After a mosquito bite, the skin may become red, swollen, and itchy due to the release of acidic substances by the mosquito. Scratching further irritates the skin, worsening the inflammatory response and potentially intensifying redness, swelling, and itching.

　　2. Causing infection: During scratching, the skin's surface defense mechanisms may be compromised, allowing bacteria to enter and cause secondary infection. Infected skin may exhibit symptoms such as pain and pus discharge, and medical treatment might be necessary.

　　3. Leaving scars: Excessive scratching may damage the dermis layer of the skin, resulting in scars or pigmentation after healing. This may not only affect appearance but also lead to long-term psychological distress.

　　4. Spreading viruses: In some cases, mosquitoes may carry viruses such as dengue fever or malaria. Although the possibility of direct virus transmission through scratching is low, skin damage caused by scratching may increase the risk of viral infection.

　　5. Prolonging recovery time: Avoiding scratching allows the skin to heal naturally, whereas scratching prolongs the healing process. This is because scratching interferes with the skin's self-repair mechanisms, extending the duration of inflammation and itching.

　　After being bitten by a mosquito, scratching should be avoided as much as possible. Cold compresses or application of anti-itch ointments can help alleviate itching and swelling. If abnormal symptoms occur at the bite site, such as expanding redness and swelling, fever, pain, or pus discharge, timely medical attention should be sought.

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What is the fastest-acting ointment for relieving itching and swelling after mosquito bites?

Generally speaking, there is no single "fastest ointment for relieving itching and swelling after insect bites," as effectiveness may vary from person to person. To relieve itching and swelling caused by insect bites, anti-inflammatory and antiallergic ointments specifically designed for this purpose should be used. Commonly used options include compound menthol ointment, paeonol ointment, hydrocortisone butyrate cream, calamine and menthol lotion, and compound betamethasone and camphor cream.

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What are the symptoms of dengue fever?

Under normal circumstances, the main symptoms of dengue fever include sudden high fever, general body aches, rash, headache, nausea, and vomiting. If discomfort symptoms appear, it is recommended to seek timely medical consultation and treatment at a正规 hospital. In addition, some patients may also experience eye socket pain and swollen lymph nodes. If you notice any of the above symptoms and have a recent history of mosquito bites or have traveled to areas where dengue fever is prevalent, seek medical attention promptly.

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Why do mosquito bites cause bumps?

Under normal circumstances, the main reasons for swelling after a mosquito bite include irritation from mosquito saliva components, immune system reactions, weakened skin barrier function, localized allergic reactions, and skin infections. If discomfort symptoms occur, it is recommended to seek timely medical treatment at a正规 hospital. In daily life, it is important to take mosquito prevention measures, such as using mosquito nets and insect repellents.

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Can AIDS be transmitted through mosquito bites?

Under normal circumstances, AIDS cannot be transmitted through mosquito bites. In daily life, there is no need to avoid normal contact with individuals infected with HIV due to concerns about transmission; shaking hands, hugging, and similar activities will not lead to infection. Preventing AIDS requires practicing safe sex, avoiding the sharing of needles, and not receiving blood transfusions未经检测的血液 translates to blood that has not undergone testing. If you have engaged in high-risk behavior, please seek medical advice promptly.