a tight foreskin leads to hygiene issues which can result in infected smegma (waxy secretion of foreskin). You need to wash it on daily basis and have to start medications for your tight foreskin to get rid of it permanently. There are some good medicines in ayurveda which can help you.
The cause of scratching can be a fungal infection and need to apply creams. If the itching does not stop, it can be considered as the behavioural pattern or mannerism very common in children of this age.
Fungal infections on skin are the most common of all and are effectively treated with homeopathy. I advise you to stop allopathic treatment as it gives temporary results only with lots of side effects, it will recur once you stop medicines and homeopathic treatment cures it from roots without side effects. No chance of recurrence. You can consult me online for homoeopathic treatment without side effects.
Treatment depends on the severity. Fungal infection or ring worm. When occurs in groin, called as jock itch. Usually fungal infection is common in moist areas of body like skin folds. It's mostly circular or round in appearance. May be red or black in colour. Treatment depending on the type and severity. Avoid sharing clothes, towels and soap; sweating also increases it. As it has to be differentiated from eczema and infection, its a must to see and confirm the diagnosis for proper treatment. So, please send photos of the affected area by direct online consultation for accurate diagnosis and treatment.
Stop using fucibet. Try using plain fuscidic acid and clotrimazole ointment together, two times a day. Must get a physical examination done by a urologist, to check for any bacterial infection, which will oral antibiotics. Get your blood sugar levels checked.