Thank you for you query at AskTheDoctor.com
I understand your concern.
It looks like an insect bite. You should clean the area properly with Dettol and observe the area.
If the redness increases or there is a swelling, you may have to start antibiotics.
Otherwise, you can just apply Calamine lotion, and if there is itching then you can take Tab. Levocetirizine 5 mg once daily at bedtime for 3 days.
Hope this was helpful,
These Q&A’s are for educational purposes and should not be relied upon as a substitute for medical advice you may receive from your physician. If you have a medical emergency, please call 911. These answers do not constitute or initiate a patient/doctor relationship.