You must apply vitamin e cream on your face daily after washing your face for one hour. Also apply lemon juice on your face at night for one hour.

I suspect fungal infection take tablet fluconazole 150 mg one tablet once a week for 4 weeks tab terbinafine 250 mg one tablet daily for 14 days.
Apply clobeta gm on patch at night time.

avoid such application. tk homoeopathic treatment properly. mention all ur symptom properly to prescribe effective medicine. avoid tking oily n spicy food.

You are having fungal infection of thigh
1. Apply panderm plus ointment twice daily for (1-2 week) 2. Take one tablet of levocetrizine (5mg) at bed time if itching is severe
3. Thoroughly dry the area after taking bath and keep it dry and sweat free. Apply talcum powder in the area 4. Use loose cotton under wear instead of tight synthetic one
5. Change the under wear daily and use clean and washed one
6. Maintain personal hygiene.

You can take nihilinum 200 / 5 drops in little water thrice a day for one week.
Inform after one week with feedback.

You can take echinesia - q / 10 drops in little water thrice a day for one week. Revert back after one week with feedback.

If its the skin infection you can apply coconut oil and nycil powder mixed if it lasts long show to dr.

This medicine never cure your son allergy because allopathic medicine only palliates the diseases. So go for homoeopathy treatment for permanent cure.