The market is flooded with over the counter medicines and their results would vary from patient to patient and as such it's usage without the recommendation of the Doctor may be harmful and supposing that there is prolonged application of the ITCH GUARD from your end and there is no positive result even after its repeated use, your skin will develop resistance to the persistent germs and will cause a delayed relief of the prevalent system.
The home remedy of this symptom lies in regular usage of Aloe - Vera gel on the affected part two to three times followed by internal ingestion of three to four Neem - leaves and equal number of Tulasi leaves two times in a day for a couple of days in order to get permanent relief from this skin - disorder.
Neem and Tulasi both being antifungal, antibacterial and anti - viral would work effectively to kill the germs.
Aloe - Vera, too, works gently on the skin and eliminates the skin - problem.
If results are not being seen within a week, you may consult the Skin - specialist.