There's something on the back of the kid's neck that looks like a pimple.

A long piece of skin like ringworm on the back of the neck, mostly caused by poor personal hygiene and fungal infection. It is recommended to take the child to the dermatology department of the local hospital to find out the cause. For fungal infections, follow the doctor's advice and apply fungal drug treatment. During treatment, develop good hygiene habits and bathe frequently.