Insect bitehttps://en.wikipedia.org/wiki/Insect_bites_and_stings
Insect bite occur by biting of insects, which can cause redness and swelling in the injured area. Stings from fire ants, bees, wasps and hornets are usually painful. Bites from mosquitoes and fleas are more likely to cause itching than pain.

Localized contact dermatitis may show similar skin lesions like insect bite.

The skin reaction to insect bites and stings usually lasts for up to a few days. However, in some cases, the local reaction can last for up to two years. These bites are sometimes misdiagnosed as other types of benign or cancerous lesions.

○ Treatment ― OTC Drugs
* OTC antihistamine for relieving the itching symptom.
#Cetirizine [Zytec]
#LevoCetirizine [Xyzal]

* OTC antibiotic ointment may be used if it is a painful lesion.
#Polysporin
#Bacitracin

* OTC steroid ointment for relieving the itching symptom. However, OTC steroid ointment may not work for the low potency.
#Hydrocortisone ointment
  • It could be an insect bite or contact dermatitis caused by exposure to a strong allergen, such as pollen.
  • Mosquito bite
References Insect bite reactions 23442453
The paper discusses the symptoms of various conditions caused by insect bites, including mosquito hypersensitivity, Epstein-Barr virus NK disease related to mosquito bites, eruptive pseudoangiomatosis, Skeeter syndrome, papular pruritic eruption in HIV/AIDS, as well as symptoms caused by bed bugs, Mexican chicken bugs, assassin bugs, kissing bugs, fleas, black flies, Blandford flies, louse flies, tsetse flies, midges, and thrips.
 Stinging insect allergy 12825843
Systemic allergic reactions to insect stings are thought to impact about 1 percent of children and 3 percent of adults. In children, these reactions often manifest as skin issues such as hives and swelling, whereas adults are more prone to breathing difficulties or low blood pressure. Epinephrine is the preferred treatment for sudden severe allergic reactions, and individuals at risk should be provided with self-injection devices for emergency situations.