Doctor insights on:
Insect bites are from mosquitos, spiders, flies, ticks, and other species that use their mandibles (jaws) to attach to a person or other animal. They can then suck blood out of their "prey" and leave saliva proteins that cause itching and swelling. Other insect species, like bees, yellow jackets, wasps, hornets and fire ants actually inject venom into their prey and can not only cause localized pain and swelling, but severe, acute allergic reactions in ...Read more
That bites.: Depending on the critter, a cytotoxic protein may have been deposited in to the wound. These chemicals can certainly inhibit healing. Some are unstable when heat is applied. A wound that won't heal can certainly lead to potential problems. If this continues, have the bite evaluated.See 1 more doctor answer
Clean it: Washing the area with soap and water and keeping it clean and dry is usually enough. You can use a topical cream for itching such as cortisone or calamine if the bites are itchy. If a bee has stung you, remove the stinger by scraping the area with something firm like a credit card. See a doctor if you see worsening redness, warmth, or swelling - these can be signs of infection.
Time: Since I cannot see what your skin looks like after the insect bite I cannot give you adequate advice. If the skin is open you should clean it with saline and apply vaseline or aquaphor. If the skin is not open just be patient and any discoloration from the bug bite will fade slowly especially if it is on the lower legs.
Acceptable: Most insect bites need nothing more that keeping clean. If the bites have been excoriated (scratched) the risk of infection rises and antibiotic ointment (e.g., neosporin) can be a part of risk management to reduce chances of infection.