Dandruff is common in teenage & after 35yrs. Seborrheic dermatitis(dandruff) is linked to hormonal imbalance n insulin resistance(early prediabetes). You might need specific blood tests. Or psoriasis can confuse with dandruff sometimes. Visit an expert dermatologist, preferably one who knows how to use dermoscopy device. Dermoscopy tells u severity of dandruff and that its NOT psoriasis.

Hi Dr. Samridhi you can visit me at let me in Korean Aesthetic Skin Hospital. we have good antidandruff shampoo and other medicine for it as well.