The ultrasound says its reactive, then most likely it is. If unguided FNAC is not conclusive then try ultrasound guided FNAC. Its more accurate. In any case the postr LNs are related to scalp infections. Pl get a dermatologist opinion and get your scalp checked and treated.
Next Steps
Consult dermatologist and then get USG guided FNAC later an ENT opinion
Health Tips
1. Avoid scratching the scalp
2. Avaod palpating LNs frequently to check