I'm sorry to hear about the discomfort from the insect bite. A small, red, itchy infection after a bite can be a sign of a mild skin infection.

Here are some steps you can follow:

• Clean the area gently with mild soap and water to reduce the risk of infection.
• Avoid scratching to prevent worsening the irritation or causing further infection.
• You may consider applying an antibiotic ointment like Fucidin Ointment, which contains sodium fusidate and helps treat bacterial skin infections. However, this ointment requires a doctor's prescription, so please consult a doctor before use.
• If you notice increasing redness, swelling, pain, warmth, or if you develop fever, seek medical attention promptly.
• Keep the area dry and avoid covering it tightly unless advised by a doctor.

Since this involves a possible infection, I recommend consulting a dermatologist or a general physician who can examine the bite and prescribe appropriate treatment.

If symptoms worsen or you experience severe allergic reactions such as difficulty breathing or swelling of the face, seek emergency care immediately.To narrow down potential causes, we will need some more information.I understand you're dealing with an itchy infection from an insect bite. To assist you better, could you please share your age and gender?