Hydrocortisone cream for insect bites
Hydrocortisone 1% is the strongest topical steroid sold without a prescription in the United States, and it is a reasonable first choice for an ordinary itchy bite. Apply a thin film to the bite itself up to three or four times a day, and stop after seven days unless a clinician has told you otherwise. It treats the reaction, not the cause: it will not remove venom, kill anything, or speed up a bite that is already fading.
What it actually does
A bite itches and swells because the immune system reacts to what the insect left behind. Hydrocortisone is a mild corticosteroid: it damps that local reaction, so the itch and the redness settle faster than they would alone. It does nothing to the insect, to venom already injected, or to bacteria. That distinction decides most of the questions below.
How to use it
| Strength | 1% is the maximum available over the counter in the US; 0.5% is also sold |
| Amount | a thin film over the bite, not the surrounding skin |
| How often | up to three to four times a day, as directed on the label |
| How long | up to seven days without medical advice |
| Children | US labels say do not use on children under 2 years without asking a doctor |
Rub it in until it disappears rather than leaving a visible layer. More cream on the same bite does not work better; a thicker layer mostly stays on the surface.
When hydrocortisone is the wrong choice
- Broken, weeping or crusted skin. A steroid suppresses the local immune response, which is the last thing wanted where bacteria are already in.
- A bite that looks infected — spreading warmth, increasing pain after day two or three, pus, a red streak, fever. That needs assessing, not a steroid.
- Around the eyes, and on the face or genital skin for more than a day or two: skin there is thin, absorbs more, and thins further with repeated use.
- A tick still attached. Remove the tick first, with fine-tipped tweezers, straight out. Cream on top of an attached tick achieves nothing.
- A whole-body reaction. Hives spreading away from the bite, swelling of the lips, face or throat, wheeze or dizziness are systemic, and a cream applied to one spot cannot touch them. That is emergency care.
What to use instead or alongside
A cold pack for ten minutes is the cheapest thing that works and can be repeated freely. Calamine and colloidal oatmeal soothe without steroid. An oral antihistamine addresses the itch from the inside and is a better fit when there are many bites rather than one — see antihistamines for bug bites.
Not scratching does more than any of them. Broken skin heals slower, invites infection, and is the main reason a bite leaves a mark that outlasts it by months.
Stings are a different problem
For a wasp, hornet or bee sting the early symptom is pain rather than itch, and pain is not what a steroid addresses. Remove a bee sting by scraping it out sideways as soon as possible, cool the site, and use hydrocortisone later if the site turns itchy as it settles.
Common questions
How long does hydrocortisone take to work on a bite?
The itch usually eases within an hour or two of the first application, and the redness over a day or so. If a bite is no better after a couple of days of regular use, or is getting worse, the working assumption should change from "ordinary reaction" to something that needs looking at.
Can I use hydrocortisone cream on a child?
US over-the-counter labels say not to use it on children under 2 years of age without asking a doctor. For older children a short course on a bite is ordinary practice, but keep it off the face and use it for days rather than weeks. A pharmacist can advise for a specific age and product.
Is 1% hydrocortisone strong?
It is the weakest class of topical steroid, and it is the strongest one available in the US without a prescription. Prescription steroid creams are many times more potent. That is why a seven-day limit is on the label: the risk is not one bite, it is repeated use on the same skin.
Can I put hydrocortisone on an infected bite?
No. Spreading warmth, increasing pain after day two or three, pus, a red streak or fever mean infection, and a steroid suppresses exactly the response fighting it. That combination needs a clinician.
Hydrocortisone or antihistamine tablets?
Cream for one or a few bites in a place you can reach; tablets when there are many bites, when they are in awkward places, or when the itch is keeping you awake. They work by different routes and are commonly used together.
Get a photo assessment in the app
Everything above is free to read. The app adds what a page cannot: point your camera at the bite and get an assessment of the most likely cause, a severity read, and a day-by-day care plan — including the specific signs that mean you should be seen.
Download on the App Store — free
iPhone and iPad · Free to download · No account needed