Hi there...
Since the child is 8 yrs old, kindly consider a direct in-person consultation with a Dermatologist near you.
If in Bangalore, welcome across to connect.
If you prefer an Online option for ease of connectivity, that will work too... Consider connecting via the INSTANT ONLINE Consultation on Practo 🙏
While your pic is clear and does suggest a papular urticaria kind of picture, it's too little to go on to make a pucca diagnosis especially in a child this young.
More details will surely be needed on symptoms leading upto this and description of the problem etc + past history to arrive at an action plan.
Health Tips
Avoid OTC products, home remedies and Dr Google.
If the child is known to be allergic to things, consider this and stop 🛑 any suspect allergen especially food related.
If Insect bite 🐝 🦟 is considered likely, use protection like mosquito nets and repellant and long sleeved clothing.
Topical mild 1% hydrocortisone application can be given a trial.