Learn Romanian: Văd că scalpul tău are din ce în ce mai multă mătreață. - I see that your scalp has more and more dandruff.

This is a fixed phrase in Romanian used to express a progressive increase, translating to "more and more" or "increasingly". It is placed directly before the adjective or adverb you want to intensify, which in this sentence is multă.

Why is the feminine form multă used instead of the default mult?

Even though it follows the fixed structure din ce în ce mai, the word for much (mult) still acts as an adjective modifying mătreață (dandruff). Because mătreață is a feminine singular noun, the adjective must agree with it and take the feminine singular form multă.

Why does scalp take the definite article -ul (scalpul) if the English translation is just "your scalp"?

In Romanian grammar, whenever a noun is directly modified by a possessive adjective like tău (your), the noun itself must take the definite article. So "your scalp" is constructed literally as "the scalp your" (scalpul tău).

Could I use the subjunctive here and say văd să aibă instead of văd că are?

No, because verbs of clear perception and factual observation, like a vedea (to see), introduce a certainty or a stated fact. Therefore, they must be followed by the conjunction că and the indicative mood (are). The subjunctive is reserved for doubts, wishes, or commands.