I can give some guidance, but I need to clarify—without an in-person exam, I can’t diagnose you. That said, brown crusty spots on the skin can have several causes, some harmless and some that need attention.
Common Possibilities
- Seborrheic Keratosis
- Usually brown, waxy or “stuck-on” spots
- Common in adults over 40
- Usually harmless, cosmetic concern
- Lentigines (“Age spots” / “Liver spots”)
- Brown spots caused by sun exposure
- Flat, not usually painful
- Harmless but check for changes
- Actinic Keratosis
- Rough, crusty, scaly spots from sun damage
- Can be precancerous
- Often on sun-exposed areas
- Moles or Skin Growths
- New or changing moles should be watched
- Look for asymmetry, irregular borders, multiple colors, or rapid growth
- Other Causes
- Fungal infections, eczema, or allergic reactions can sometimes create crusty patches
- Less common: skin cancers like melanoma or squamous cell carcinoma
When to Be Concerned (Seek Care Quickly)
- Rapid growth or change in color
- Pain, bleeding, or itching
- Crusting that won’t heal
- Multiple spots appearing suddenly
What You Can Do Now
- Take clear photos to track changes
- Avoid picking or scratching the spots
- Use gentle skincare; avoid harsh chemicals
- Book a tele-dermatology appointment if your doctor’s office is full—many dermatologists offer virtual consults