There are several ways to stop itching fast, including:

1. Apply a cold, wet cloth or ice pack to the affected area: This can help reduce inflammation that may be contributing to the itch.

2. Take an oatmeal bath: Colloidal oatmeal can help to relieve dryness and itching.

3. Moisturize throughout the day: Use a gentle and fragrance-free moisturizer, especially after a bath or shower.

4. Use a humidifier: If the itching is caused or triggered by dry air, using a humidifier can help to add moisture back into your environment.

5. Apply anti-itch cream: Creams that contain hydrocortisone can help calm inflamed, itchy skin.

6. Take over-the-counter antihistamines: These can help reduce itching associated with allergies and other conditions.

7. Avoid hot water: Exposing the affected area to hot water can further irritate the itching skin.

8. Wear loose-fitting cotton clothing: Cotton allows the skin to breathe and prevents overheating.

Its important to note that the treatment for itching will largely depend on the cause. If itching does not subside, it is best to talk to a doctor or dermatologist about extending the therapy or trying an alternative treatment.