Persistent Red Dots After Mosquito Bites: Causes and Solutions

Insect bites

Hello, I would like to ask about a situation I experienced.
I seemed to have been bitten by a mosquito on my hand, which felt a bit itchy, so I scratched it lightly.
After a few days, it healed, but since then, there have been small red dots at the site of the bite.
These red dots are about 0.1mm in size, flat, and not itchy.
I thought they would disappear after a few days or weeks, but the red dots have not faded at all and have been on my hand for almost a year now.
Could you please explain why this is happening and how I can get rid of them? Thank you for your response, doctor.
^^

Xiao Xiao, 10~19 year old female. Ask Date: 2022/11/05

Dr. Wu Yuxin reply Dermatology

It is essential to first identify the lesion in order to determine the appropriate treatment method; it is recommended to seek medical attention.

Reply Date: 2022/11/05

More Info

Persistent red dots on the skin, especially after insect bites, can be concerning, particularly when they linger for an extended period. In your case, it sounds like you experienced a mosquito bite that led to a red spot on your hand, which has persisted for about a year without any associated symptoms such as itching or elevation.
There are several potential explanations for why this red dot remains. One possibility is that it could be a post-inflammatory hyperpigmentation (PIH), which is a common skin condition that occurs after an injury or inflammation to the skin, such as a mosquito bite. When the skin heals, it can sometimes leave behind a darker or red mark, which may take a long time to fade. This is particularly common in individuals with darker skin tones.

Another possibility is that the red dot could be a form of a benign vascular lesion, such as a cherry angioma or a petechial spot. Cherry angiomas are small, benign growths made up of small blood vessels that can appear anywhere on the body and are usually harmless. Petechiae are small red or purple spots that can occur due to minor bleeding under the skin, often as a result of trauma or pressure.
If the red dot has not changed in size, shape, or color and is not associated with any other symptoms, it is likely benign. However, if you notice any changes or if it begins to itch, bleed, or cause discomfort, it would be wise to consult a dermatologist for a thorough examination. They may recommend a biopsy or other diagnostic tests to rule out any serious conditions.

In terms of treatment, if the red dot is indeed a benign condition, there may not be a need for intervention. However, if you are looking to reduce its appearance, options may include topical treatments such as hydroquinone, retinoids, or laser therapy, which can help fade hyperpigmentation. It's essential to consult with a healthcare professional before starting any treatment to ensure it's appropriate for your specific situation.

In summary, while persistent red dots after mosquito bites can be concerning, they are often benign and may simply be a result of the skin's healing process. If you have any doubts or if the condition changes, seeking medical advice is always the best course of action. Regular skin checks and maintaining good skin care practices can also help in managing and monitoring any skin changes.

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