Diagnosis Before Treatment

Conditions, Explained Honestly

Treatment names change; problems do not. These guides start from what you see in the mirror — and explain what is happening underneath, what the evidence supports, and what nothing can do.

The Doctor Other Doctors Train With
International KOL & trainer for 14+ device brandsTrained 500+ doctors across AsiaMBBS (NUS) · MRCS (Edinburgh) · Dual UK Masters with DistinctionEvery assessment personally by Dr Sin Yong

Face

Jowls & Lower Face Sagging — condition guide by Dr Sin YongJowls & Lower Face SaggingA jowl is descended tissue — skin, fat and the SMAS layer sliding below the jawline as the ligaments that once held them attenuate. It is a position p…Hollow Cheeks & Facial Volume Loss — condition guide by Dr Sin YongHollow Cheeks & Facial Volume LossFacial volume loss is the quiet ageing process: the deep fat compartments deflate and the facial skeleton itself resorbs, removing the scaffolding the…Facial Pigmentation: Which Brown Is Yours? — condition guide by Dr Sin YongFacial Pigmentation: Which Brown Is Yours?“Pigmentation” is not one condition. Melasma, solar lentigines, post-inflammatory hyperpigmentation and freckles are different diseases with different…Uneven Texture & Enlarged Pores — condition guide by Dr Sin YongUneven Texture & Enlarged PoresTexture is structural. Pore size is set by sebaceous output and the collagen scaffold around each follicle; roughness by micro-scarring and disordered…The Ageing Neck: Lines, Crepe & Laxity — condition guide by Dr Sin YongThe Ageing Neck: Lines, Crepe & LaxityThe neck ages faster than the face it carries: its skin is thinner, has fewer sebaceous glands, gets less sunscreen, and moves thousands of times a da…Fungal Acne (Malassezia Folliculitis) — condition guide by Dr Sin YongFungal Acne (Malassezia Folliculitis)“Fungal acne” is not acne at all. It is folliculitis caused by Malassezia — a yeast that lives on everyone's skin — overgrowing inside the hair follic…Perioral Dermatitis — condition guide by Dr Sin YongPerioral DermatitisPerioral dermatitis is an inflammatory eruption of small red papules and pustules clustered around the mouth — sometimes the nose and eyes — with a te…Hormonal Acne in Adult Women — condition guide by Dr Sin YongHormonal Acne in Adult WomenAdult female acne is not leftover teenage acne. It clusters on the lower third of the face — jawline, chin, upper neck — flares with the menstrual cyc…Cystic & Nodular Acne — condition guide by Dr Sin YongCystic & Nodular AcneCystic and nodular acne is acne's deep form: inflamed lesions seated in the lower dermis that hurt, persist for weeks, never “pop”, and scar. It is th…Sebaceous Hyperplasia — condition guide by Dr Sin YongSebaceous HyperplasiaSebaceous hyperplasia is an overgrown oil gland: a small, soft, yellowish or skin-coloured dome — often with a central dimple — that appears on the fo…Milia: The White Bumps That Never Pop — condition guide by Dr Sin YongMilia: The White Bumps That Never PopA milium is a tiny keratin cyst — a pearl of compacted skin protein sealed beneath the surface with no opening. Milia look like whiteheads but behave …Seborrhoeic Keratosis (“Age Warts”) — condition guide by Dr Sin YongSeborrhoeic Keratosis (“Age Warts”)A seborrhoeic keratosis is a benign overgrowth of the skin's outermost cells — a waxy, warty plaque that looks pasted onto the surface, as if it could…Xanthelasma: Yellow Plaques on the Eyelids — condition guide by Dr Sin YongXanthelasma: Yellow Plaques on the EyelidsXanthelasma palpebrarum is a soft, flat, yellowish plaque on the eyelid — lipid-laden immune cells accumulated in the skin, most often near the inner …Dark Eye Circles: Which Type Is Yours? — condition guide by Dr Sin YongDark Eye Circles: Which Type Is Yours?“Dark circles” is one complaint hiding three diagnoses: brown circles from pigment in the skin, blue-purple circles from vessels showing through thin …Melasma: The Pigment That Comes Back — condition guide by Dr Sin YongMelasma: The Pigment That Comes BackMelasma is a chronic, relapsing pigment disorder — symmetrical soft-edged brown patches across the cheeks, forehead or upper lip. It is not simple sun…Sun Spots (Solar Lentigines) — condition guide by Dr Sin YongSun Spots (Solar Lentigines)A solar lentigo is a discrete, sharply bordered brown spot — the skin's permanent bookmark of cumulative sun exposure, appearing on the cheeks, temple…Facial Thread Veins (Telangiectasias) — condition guide by Dr Sin YongFacial Thread Veins (Telangiectasias)Telangiectasias are permanently dilated small blood vessels visible at the skin surface — fine red, purple or blue threads tracing the nostril creases…Rosacea & Persistent Redness — condition guide by Dr Sin YongRosacea & Persistent RednessRosacea is a chronic inflammatory condition of the central face: flushing that comes hard and lingers, background redness that stops fading, visible t…Post-Inflammatory Hyperpigmentation — condition guide by Dr Sin YongPost-Inflammatory HyperpigmentationPIH is the footprint inflammation leaves in pigmented skin: a flat brown, grey or slate mark exactly where a pimple, bite, rash or overly aggressive t…Acne Scars: Icepick, Boxcar or Rolling? — condition guide by Dr Sin YongAcne Scars: Icepick, Boxcar or Rolling?“Acne scars” is a category, not a diagnosis. The classification physicians use — icepick, boxcar, rolling, plus raised hypertrophic scars — exists bec…Jowl Fat vs Jowl Sagging — condition guide by Dr Sin YongJowl Fat vs Jowl SaggingNot every jowl is sagging. The lower face carries discrete, named fat compartments — and in some faces the jowl is primarily a fat pocket sitting alon…Buccal Fat & the Persistently Round Face — condition guide by Dr Sin YongBuccal Fat & the Persistently Round FaceThe buccal fat pad is a deep, walnut-sized fat structure in the middle of each cheek — distinct from the fat under the skin, and largely indifferent t…Double Chin: What's Actually Under There — condition guide by Dr Sin YongDouble Chin: What's Actually Under ThereA double chin is rarely just fat. Under the chin, four contributors stack: a submental fat pocket (above or below the muscle layer), skin laxity, the …Eye Bags: Puffiness, Prolapse or Shadow? — condition guide by Dr Sin YongEye Bags: Puffiness, Prolapse or Shadow?An eye bag is one of three things: orbital fat pushing forward against a weakened restraining wall (a true bag), fluid that pools and shifts (morning …Droopy & Hooded Eyelids — condition guide by Dr Sin YongDroopy & Hooded EyelidsA heavy upper lid has three possible authors: excess, lax lid skin folding down (dermatochalasis — the common 'hooding'), the lid itself sitting too l…Upper Lip Lines (“Barcode Lines”) — condition guide by Dr Sin YongUpper Lip Lines (“Barcode Lines”)The vertical lines of the upper lip — barcode lines, smoker's lines, lipstick lines — are etched by four forces at once: a purse-string muscle that cr…Forehead Lines & Frown Lines — condition guide by Dr Sin YongForehead Lines & Frown LinesThe forehead's horizontal lines and the vertical '11s' between the brows are muscle handwriting: the frontalis raising the brows and the glabellar com…Thin Lips & the Ageing Lip — condition guide by Dr Sin YongThin Lips & the Ageing LipLips thin two ways: some were always slim (genetics), and all deflate with age — volume shrinks, the pink vermilion rolls inward, the white upper lip …Square Jaw & Masseter Bulk — condition guide by Dr Sin YongSquare Jaw & Masseter BulkA wide lower face has three possible materials: masseter muscle (the clenching muscle at the jaw angle, enlarged by use), bone (the mandible's own arc…Flat Nose Bridge & Profile Balance — condition guide by Dr Sin YongFlat Nose Bridge & Profile BalanceA low nasal bridge — common in East and Southeast Asian anatomy — flattens the face's central axis in photographs and glasses slide down it all day. N…Nasolabial Folds — condition guide by Dr Sin YongNasolabial FoldsThe nasolabial fold is the line running from each nostril to the corner of the mouth — present in every smiling face, and deepening at rest with age. …Post-Inflammatory Erythema (Red Acne Marks) — condition guide by Dr Sin YongPost-Inflammatory Erythema (Red Acne Marks)PIE is the flat red or pink mark left where a pimple used to be — not a scar, not pigment, but dilated and damaged tiny blood vessels lingering after …

Body

Stubborn Fat: The Pockets Diet Can't Reach — condition guide by Dr Sin YongStubborn Fat: The Pockets Diet Can't ReachWeight loss shrinks fat cells everywhere at once — it cannot choose where. The pockets that survive every diet (lower belly, flanks, inner thighs, und…Loose Skin After Weight Loss — condition guide by Dr Sin YongLoose Skin After Weight LossSkin that expanded over years cannot always contract in months. After significant weight loss the fat is gone but the stretched envelope remains — a c…Cellulite: Architecture, Not Fat — condition guide by Dr Sin YongCellulite: Architecture, Not FatCellulite is not excess fat — lean women have it and most men never will. It is architecture: vertical fibrous bands tethering skin down while fat lob…Stretch Marks: Torn Collagen, Two Stages — condition guide by Dr Sin YongStretch Marks: Torn Collagen, Two StagesA stretch mark is a tear in the dermis — collagen and elastin that gave way under stretching faster than they could remodel. Red-purple marks are the …Skin Tags (Acrochordons) — condition guide by Dr Sin YongSkin Tags (Acrochordons)A skin tag is a soft, benign outgrowth of skin on a stalk — collagen and tiny blood vessels wrapped in normal surface skin. They grow where skin rubs …Keratosis Pilaris (“Chicken Skin”) — condition guide by Dr Sin YongKeratosis Pilaris (“Chicken Skin”)Keratosis pilaris is the sandpaper skin of the upper arms, thighs and sometimes cheeks: hundreds of tiny rough bumps where keratin has plugged the ope…Excessive Sweating (Hyperhidrosis) — condition guide by Dr Sin YongExcessive Sweating (Hyperhidrosis)Hyperhidrosis is sweating beyond what temperature regulation requires — underarms soaking through shirts indoors, palms that smear ink and dodge hands…Keloids & Hypertrophic Scars — condition guide by Dr Sin YongKeloids & Hypertrophic ScarsA hypertrophic scar is healing that overshot: raised, red, but confined to the original wound and often settling with time. A keloid is healing that n…Varicose & Spider Veins on the Legs — condition guide by Dr Sin YongVaricose & Spider Veins on the LegsLeg veins fail on a spectrum: fine surface spider veins, blue reticular veins beneath them, and true varicose veins — rope-like, bulging vessels whose…Post-Pregnancy Stretch Marks — condition guide by Dr Sin YongPost-Pregnancy Stretch MarksStriae gravidarum — pregnancy stretch marks — are dermal tears beneath intact surface skin, written across the abdomen, breasts, hips and thighs in th…The Postpartum Tummy & Diastasis Recti — condition guide by Dr Sin YongThe Postpartum Tummy & Diastasis RectiA postpartum tummy that persists past the first year is usually built from three parts: a stretched abdominal wall whose midline has separated (diasta…Dark Underarms (Axillary Hyperpigmentation) — condition guide by Dr Sin YongDark Underarms (Axillary Hyperpigmentation)Dark underarms are not a hygiene problem — they are pigment, laid down by years of shaving trauma, friction, and irritation from products, on skin tha…Back & Body Acne (Truncal Acne) — condition guide by Dr Sin YongBack & Body Acne (Truncal Acne)Acne on the back, chest and shoulders is the neglected half of the disease: present in roughly half of facial-acne patients, less discussed, harder to…

Hair

Female Hair Thinning: Diagnosis Before Treatment — condition guide by Dr Sin YongFemale Hair Thinning: Diagnosis Before TreatmentFemale hair loss is a diagnosis, not a product category. A widening parting with preserved hairline points one way; sudden handfuls in the shower poin…The Receding Hairline: Defend What's Alive — condition guide by Dr Sin YongThe Receding Hairline: Defend What's AliveMale pattern hair loss is not hair falling out — it is follicles shrinking. Under DHT, genetically sensitive follicles at the temples and crown produc…Sudden Shedding: When Hair Falls in Handfuls — condition guide by Dr Sin YongSudden Shedding: When Hair Falls in HandfulsTelogen effluvium is the hair cycle stumbling in unison. A physiological shock pushes thousands of follicles into their resting phase together — and t…Androgenetic Alopecia (Pattern Hair Loss) — condition guide by Dr Sin YongAndrogenetic Alopecia (Pattern Hair Loss)Androgenetic alopecia is the diagnosis behind most thinning heads: genetically sensitive follicles responding to normal androgen levels by miniaturisi…Alopecia Areata (Patchy Hair Loss) — condition guide by Dr Sin YongAlopecia Areata (Patchy Hair Loss)Alopecia areata is the immune system mistakenly attacking hair follicles — announcing itself as smooth, round, completely bald patches that appear ove…Traction Alopecia — condition guide by Dr Sin YongTraction AlopeciaTraction alopecia is hair loss by physics: years of tension from tight ponytails, buns, braids, extensions or helmets steadily loosening and finally s…Dandruff & Seborrhoeic Dermatitis — condition guide by Dr Sin YongDandruff & Seborrhoeic DermatitisDandruff and seborrhoeic dermatitis are one condition at two volumes: an inflammatory response to Malassezia yeast on an oily scalp — flaking at the m…
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