Hydrocortisone vs Mometasone

When to Apply: Twice a day, on the rash only, on clean dry skin. A thin film that makes the skin look shiny is enough. One fingertip unit, the amount along the last joint of an adult index finger, covers about two adult palms. Moisturizer can go on a few minutes before or after.

How to Start: Twice daily from day one, until the rash is flat rather than merely better. Usually three to seven days. Two weeks is the outer limit for one stretch without seeing a clinician, less on the face.

If It Irritates: Stinging on application is usually the base, not the steroid, and is more likely on broken skin or from an alcohol-containing gel or spray. An ointment often settles it. Itch or redness that worsens over days can mean an allergy to something in the product, which does happen with steroids.

If It Is Not Working: Stop after about a week and reassess. A rash that does not respond to hydrocortisone is often not eczema. Ringworm, a yeast rash in a fold and psoriasis all look plausible and all need something different.

No blood tests are needed for ordinary short courses in a healthy adult. Monitoring means looking at the skin: did the rash clear, has the skin gone thin or shiny, have small blood vessels appeared, are stretch marks forming in the folds.

Children absorb proportionally more because they have more skin surface for their size, so a doctor watches how much is used and over how large an area. Anyone applying a steroid to large areas most days for months should be under review rather than repeating over-the-counter purchases.

Hydrocortisone is not a drug to stay on continuously. Where a condition needs ongoing control, the plan is short bursts for flares, emollients doing the daily work, or a switch to a treatment designed for maintenance.

First few minutesApplying it: A thin layer on the affected skin. The mildest steroid strength, which is why it is sold over the counter.

Days 1 to 2Itch first: Itching and stinging ease before the rash looks different, the earliest sign it is working. Insect bites and minor irritation settle in a day or two, and that is the whole course.

Days 3 to 7Clearing: Redness fades and the skin flattens. A mild eczema flare settles here; cracked skin takes longer than skin that was only red. Weeping or crusting should be settling, not spreading.

Weeks 1 to 2Judge it here: A mild rash should be gone or nearly gone. Contact dermatitis clears steadily once the trigger is gone.

Weeks 2 to 4Mild seborrheic dermatitis: Redness and flaking around the nose and brows improve.

After stoppingMarks stay behind: Brown or gray patches where the rash was are pigment change, not scarring. They fade over weeks to months.

Hydrocortisone is cheap. Store-brand 1% cream is the same drug at the same strength as the branded tube, usually for much less. Anti-itch versions with added ingredients cost more without treating the inflammation any better.

Prescription 2.5% is generic and also cheap, though the visit costs more than the tube. Ointments and creams are the cheapest vehicles. Foams and sprays cost more.