Most bug bites and stings — from mosquitoes, fleas, mites, ants, or bees — are harmless and clear up on their own within hours to a few days. They cause a local reaction of redness, swelling, and itching or pain rather than illness. There is no medicine that "cures" a bite; treatment is about relieving symptoms while it heals. The standard first step is non-drug care (wash with soap and water, apply a cold pack, don't scratch), and over-the-counter products are used mainly to calm itching, swelling, and minor pain. The exception is a severe allergic reaction (anaphylaxis), which is a medical emergency, not something to treat with everyday remedies.
Available without a prescription — follow each label.
hydrocortisone 1% cream/ointment Cortizone-10 topical corticosteroid (low-potency) | OTC labels cover temporary relief of itching from insect bites and minor skin irritation. A small amount applied to the bite is a common choice for itch and local swelling. Per Drug Facts: do not use on broken or infected skin or in the eyes, use no more than 3-4 times a day, and stop and ask a doctor if symptoms last more than 7 days or clear and come back. Use sparingly on children. |
diphenhydramine (oral) Benadryl 1st-generation (sedating) oral antihistamine | May help itching and hives from bites by blocking histamine, but it causes drowsiness. Often used for nighttime relief; avoid before driving or operating machinery. Follow the Drug Facts dose and don't combine with other sedating products or alcohol. |
cetirizine / loratadine (oral) Zyrtec / Claritin 2nd-generation (less-sedating) oral antihistamine | A less-sedating alternative for itch and hives, often preferred for daytime use. Convenient once-daily dosing. These may calm an allergic itch but do not reduce the risk of a severe reaction and are not a substitute for emergency care if breathing or the face/throat are affected. |
calamine lotion Caladryl (calamine) topical skin protectant / anti-itch | An old, gentle topical that soothes itching and minor irritation and dries weepy spots. An option for widespread itchy bites where a steroid cream isn't needed. For external use only; avoid the eyes. |
A doctor may prescribe these — not for self-treatment.
prescription-strength topical or oral corticosteroids corticosteroid (mid/high-potency topical or oral, e.g. a short prednisone course) | For large, very inflamed local reactions that OTC hydrocortisone doesn't control. A clinician decides whether a stronger steroid is appropriate and for how long — these are not OTC and should never be self-started. |
oral antibiotics antibiotic (e.g. cephalexin, dicloxacillin) | Only for a bite that becomes secondarily infected (spreading redness, warmth, pus, a red streak, or fever — which may indicate cellulitis). Antibiotics treat the skin infection, not the bite itself, and require a clinician's diagnosis. Do not take leftover or someone else's antibiotics. |
epinephrine auto-injector EpiPen, Auvi-Q emergency adrenergic agonist (anaphylaxis rescue) | Prescribed in advance to people with a known severe allergy to insect stings. It is the first-line treatment for anaphylaxis: use it at the first sign of a severe reaction and call 911 right away. A doctor prescribes it and trains you on when and how to use it; it is not a routine bite remedy. |
Start with self-care, which handles most bites: remove a stinger by scraping it sideways with a fingernail or the edge of a card (don't squeeze or use tweezers, which can release more venom), wash with soap and water, and put a cloth-wrapped ice pack on the area for about 10-20 minutes to ease swelling and itch. Elevate the area if it's swollen, and resist scratching — broken skin is how bites get infected. Choose a medicine by your main symptom: for itch, a 1% hydrocortisone cream is a common first choice, with calamine or pramoxine as steroid-free alternatives, and an oral antihistamine if itching is widespread or keeping you awake (sedating diphenhydramine at night and less-sedating cetirizine/loratadine during the day). For pain from stings, acetaminophen or ibuprofen helps. Evidence that any single product dramatically speeds healing is limited — these mainly make you more comfortable while the bite resolves on its own. Note that official guidance differs on home remedies: the CDC describes a baking-soda paste for mosquito-bite itch, while the NHS advises against bicarbonate of soda, so don't rely on these in place of a proven OTC anti-itch product. If you're outdoors a lot, prevention (EPA-registered repellents, covering up, checking for ticks) does more than any after-the-fact treatment.
Call 911 immediately for signs of a severe allergic reaction (anaphylaxis) after any bite or sting: trouble breathing or wheezing, swelling of the face, lips, mouth, or throat, tightness in the throat or trouble swallowing, dizziness or fainting, a fast-spreading rash, or feeling weak or turning blue — and use an epinephrine auto-injector first if one has been prescribed. Seek same-day or urgent care if a bite shows signs of infection: spreading redness or warmth, increasing pain, pus, a red streak moving outward from the bite, or a fever. See a doctor or pharmacist if itching or swelling is severe or isn't improving with OTC treatment after several days, if you were bitten by a tick (especially with a later expanding "bull's-eye" rash, fever, or aches, which can signal Lyme disease) or in an area with mosquito-borne illness, or if the person bitten is a young child, pregnant, or has a weakened immune system.
General reference, not medical advice, and not a substitute for your doctor or pharmacist. The right choice depends on your symptoms, health conditions, age, and other medicines — always read each label and confirm before taking anything.
pramoxine 1% Aveeno Anti-Itch, Sarna Sensitive topical local anesthetic (anti-itch) | A non-steroid topical that numbs the itch/sting sensation. An option for people who want to avoid steroids or use it between hydrocortisone applications. External use only; stop if irritation develops. |
acetaminophen or ibuprofen (oral) Tylenol / Advil, Motrin analgesic (acetaminophen) / NSAID (ibuprofen) | For painful bites or stings (e.g., bee, wasp, fire ant). Take per the Drug Facts label. Aspirin should not be given to children or teenagers because of the risk of Reye's syndrome. Ibuprofen is best taken with food and avoided by people with stomach-ulcer, kidney, or certain heart conditions unless cleared by a clinician. |