Severe dandruff can irritate the scalp and increase hair fall because constant itching, inflammation, and excess oil may weaken the hair roots over time. Stress, sweat, irregular hair washing, fungal overgrowth, poor sleep, nutritional deficiency, and harsh hair products can also worsen both dandruff and shedding. Treatment usually focuses on calming the scalp and reducing fungal growth. Anti-dandruff shampoos containing ketoconazole, zinc pyrithione, selenium sulfide, or salicylic acid are commonly used to reduce flakes and itching. Washing the scalp regularly and leaving the shampoo on for a few minutes before rinsing may improve results. Mild hair serums, adequate protein intake, iron-rich foods, and proper sleep may also support healthier hair growth gradually. Avoid frequent scratching, heavy oil application to the infected scalp, and repeated use of strong chemical hair products, as these may worsen scalp irritation. Red painful bumps, pus, patchy bald areas, or rapid hair thinning can indicate stronger scalp inflammation and may need detailed scalp treatment.

Long-standing dandruff that doesn't improve even after using different anti-dandruff shampoos usually means the scalp is dealing with a chronic condition rather than simple dryness. Most commonly, it is seborrheic dermatitis, where oil glands and a normal skin fungus trigger repeated flaking and itching. In some people, psoriasis, sensitivity to hair products, or even inconsistent treatment use can also keep the problem active. Daily washing alone doesn't always fix it because the issue is more about inflammation on the scalp than just cleanliness. At this stage, rotating a medicated shampoo like ketoconazole, zinc pyrithione, or selenium sulfide a few times a week often works better than using many products at once. The key is leaving the shampoo on the scalp for a few minutes before rinsing so it actually works. Heavy oiling during active dandruff can sometimes worsen flaking, so it's better to keep the scalp light and clean. If itching, thick scaling, or hair fall is continuing despite regular treatment, it's worth seeing a dermatologist again. Sometimes the treatment needs a scalp lotion or a short course of anti-inflammatory medicine to bring it under control properly.

If dandruff and skin allergy persist despite ketoconazole shampoo, the scalp may need a different approach or more extended maintenance care. Avoid harsh hair products, keep the scalp moisturised, and consult a doctor to adjust treatment and manage the allergy effectively.

Itchy scalp with heavy hair fall and thinning is often due to dandruff, scalp infection, or inflammation affecting hair roots. Keep your scalp clean with a gentle anti-dandruff routine, avoid scratching, reduce oil buildup, and use mild products to protect hair. Eat a balanced diet, stay hydrated, and manage stress to support hair growth. If itching and hair loss continue or worsen, consult a doctor to examine the scalp and guide appropriate treatment.

What you are describing sounds more like a stubborn scalp condition such as seborrheic dermatitis, where dandruff, excess oil, and a mild fungal overgrowth all act together. The white powdery flakes that fall off, along with itching and new small pimples on the scalp, can also happen when the scalp becomes irritated from repeated scratching or using too many products at once. In some cases, folliculitis (infection of hair follicles) can also cause pimple-like bumps. When this becomes long-standing, simply switching shampoos or using drops may not be enough. The scalp often needs a more structured routine rather than multiple products. A medicated shampoo like ketoconazole, zinc pyrithione, or selenium sulfide, used a few times a week, left for a few minutes before washing, usually works better than frequent changes. Avoid heavy oiling during active flares, as it can sometimes worsen the condition in sensitive scalps. Since you also have pimples and worsening symptoms, it would be better to get a dermatologist review. You may need a short course of scalp lotion or anti-inflammatory treatment to calm the infection and irritation properly.