An itchy scalp with small bumps that form crusts and later spreads to itchy patches on the face and neck can be caused by a few common conditions. Let’s break this down into possible causes first, then discuss first-line remedies (natural and medical), and finally the follow-up procedures.

After applying home remedy and over the counter medications for about after a month see your dermatologist or a doctor. Also, have yourself checked for diabetes as most fungal and other infections thrive in high sugar environment.

Most Probable Causes

1. Seborrheic Dermatitis (Dandruff / Eczema type)
   • Caused by an overgrowth of yeast (Malassezia) + excess oil production.
   • Appears as greasy scales, itchy red bumps, may spread to face (around eyebrows, nose, behind ears, beard area, neck).
2. Folliculitis (Inflamed Hair Follicles)
   • Bacterial (Staphylococcus) or fungal infection of the scalp follicles.
   • Causes itchy red bumps that may crust or ooze.
3. Scalp Psoriasis
   • Thick, silvery or whitish crusts over red patches.
   • Often extends beyond the scalp line (forehead, nape, ears).
4. Tinea Capitis (Fungal Ringworm of the Scalp)
   • Causes scaly, itchy patches, sometimes with hair loss and spreading to face/neck.
5. Contact Dermatitis
   • Allergic reaction to hair products, shampoos, or dyes.
   • Can cause itchy bumps, rash, and crusts.

First-Line Remedies (Natural & Home-Based)

These can be tried first if symptoms are mild:

1. Gentle Scalp Hygiene
   • Use mild, fragrance-free shampoo (avoid strong chemicals or daily harsh scrubbing).
   • Rinse scalp well to avoid product buildup.
2. Coconut Oil or Olive Oil
   • Natural antifungal and moisturizing.
   • Massage a small amount into scalp for 20–30 mins, then rinse. Helps soften crusts.
3. Tea Tree Oil (diluted)
   • Natural antifungal/antibacterial.
   • Mix a few drops with carrier oil (like coconut oil) and apply on scalp patches.
   • Caution: May irritate sensitive skin → patch test first.
4. Apple Cider Vinegar Rinse
   • Antifungal and helps reduce scalp flakes.
   • Dilute 1 part vinegar with 2–3 parts water, rinse scalp after shampoo.
5. Aloe Vera Gel
   • Soothes itching and irritation. Apply directly on scalp and affected facial patches.

Medical Products & Alternatives

If natural methods don’t control the condition within 1–2 weeks or symptoms worsen:

1. Medicated Shampoos (for Seborrheic Dermatitis / Dandruff)
   • Ketoconazole (Nizoral)
   • Selenium sulfide (Selsun Blue)
   • Zinc pyrithione (Head & Shoulders Clinical)
   • Coal tar or salicylic acid shampoos (for scaling and crusts)
   • Use 2–3x weekly, alternating with mild shampoo.
2. Topical Antifungal Creams
   • For spreading facial/neck patches → ketoconazole cream or clotrimazole.
3. Topical Corticosteroids (short-term)
   • Hydrocortisone 1% cream (for face/neck irritation).
   • Stronger steroids for scalp may need prescription.
4. Antibiotics (if folliculitis/bacterial infection suspected)
   • Topical mupirocin or oral antibiotics (needs doctor’s evaluation).
5. Oral Antifungals (if tinea capitis confirmed)
   • Griseofulvin or terbinafine → prescription only.

Follow-up Procedures

1. Monitor Progress
   • Natural/home remedies: Expect improvement within 1–2 weeks.
   • Medicated shampoos/creams: Continue for 2–4 weeks before judging effectiveness.
2. Seek Medical Evaluation If:
   • Scalp crusts are thick and painful
   • Hair loss is occurring
   • Rash is spreading rapidly to face/neck/body
   • Signs of infection (pus, oozing, fever, swollen lymph nodes)
3. Dermatologist Referral
   • For patch testing (to rule out allergies).
   • For biopsy/culture if unclear whether fungal, bacterial, or psoriasis.

Summary:

• Most likely causes: seborrheic dermatitis, fungal infection, or folliculitis.
• Start with gentle cleansing, natural antifungals (tea tree, coconut oil, apple cider vinegar).
• If persistent, switch to medicated antifungal shampoos/creams.
• If worsening or spreading, see a doctor for stronger antifungal, antibiotic, or steroid treatment.

Here is sample  step-by-step daily care routine for your itchy scalp with bumps/crusts and spreading to face/neck. 

Two versions:

• Natural-first approach (gentle, safe to try at home)

• Medical-enhanced approach (if natural doesn’t control symptoms within 1–2 weeks)

Daily Care Routine (Natural-First Approach)

🛁 Morning / Wash Days (3–4x per week)

1. Gentle Shampooing

   • Use a mild, fragrance-free shampoo (baby shampoo or herbal non-irritating formula).

   • Gently massage scalp with fingertips (not nails) to loosen flakes.

2. Apple Cider Vinegar Rinse (2–3x per week)

   • Mix 1 part ACV + 3 parts water.

   • Apply to scalp after shampoo, leave 2–3 mins, rinse well.

3. Coconut Oil or Aloe Vera Gel (after drying)

   • If scalp is dry/itchy: apply a thin layer of coconut oil or fresh aloe vera gel to itchy areas.

   • For face/neck patches → aloe vera gel is safer (less greasy).

Evening

1. Scalp/Face Soothe

   • Dab diluted tea tree oil (2–3 drops in 1 tbsp coconut/olive oil) only on affected scalp bumps.

   • For face/neck → use plain aloe vera gel (tea tree may be too strong).

2. Avoid Irritants

   • Don’t scratch → keep nails short.

   • Change pillowcases every 2–3 days.

   • Avoid strong hair products, gels, or fragrances.

Daily Care Routine (Medical-Enhanced Approach)

(Use if natural remedies don’t help in 1–2 weeks or if symptoms worsen)

🛁 Morning / Wash Days (2–3x per week)

1. Medicated Shampoo

   • Rotate between:

     • Ketoconazole 2% (Nizoral)

     • Zinc pyrithione (Head & Shoulders Clinical)

     • Selenium sulfide (Selsun Blue)

   • Leave shampoo on scalp for 5 minutes before rinsing.

2. Face/Neck Patches

   • Apply ketoconazole cream or clotrimazole cream thinly on affected areas.

Evening

1. Anti-Inflammatory Care

   • For itching/redness: hydrocortisone 1% cream on face/neck (max 1–2 weeks).

   • For scalp: if very itchy, doctor may prescribe stronger steroid lotion.

2. Moisturizing

   • Use non-comedogenic moisturizer (aloe-based or ceramide lotion) on dry patches.

Follow-Up & Long-Term

• 1–2 weeks: Check improvement (less itch, fewer crusts).

• If better: Continue maintenance 1–2x/week with antifungal shampoo or ACV rinse.

• If not improving / spreading: See a dermatologist → may need oral antifungals (for tinea capitis) or antibiotics (for folliculitis).

• Prevent relapse:

  • Wash hair regularly, keep scalp dry.

  • Avoid sharing hats/combs.

  • Manage stress (often flares seborrheic dermatitis & psoriasis).

Rule of thumb:

• If patches are greasy/flaky → think seborrheic dermatitis → antifungal shampoo/cream.

• If ring-shaped spreading patches + hair loss → think fungal infection (tinea) → needs oral antifungals.

• If pustules with pus → think bacterial folliculitis → needs antibiotics.

These options have no known risk for G6PD Deficients.