Skincare sensitivities & contact irritants.
Persistent burning, breakouts, or flaking often stem from specific formulation vehicles rather than active ingredients. Identify common sensitizers, INCI aliases, and validated hypoallergenic alternatives.
Fragrance & Essential Oils
A clinical analysis of volatile aroma compounds, terpenes, and synthetic perfumes that trigger delayed-type contact hypersensitivity and neurovascular flushing.
Denatured Alcohol & Simple Alcohols
An evaluation of low-molecular-weight short-chain alcohols used for quick-drying finishes, penetration enhancement, and sebum stripping.
Malassezia (Pityrosporum Folliculitis)
A targeted formulation strategy for skin vulnerable to opportunistic Malassezia yeast overgrowth, commonly misdiagnosed as standard acne vulgaris.
Organic (Chemical) Sunscreen Filters
A clinical breakdown of ocular stinging, photo-contact dermatitis, and heat sensations linked to older organic ultraviolet absorbers.
Sulfate Surfactants & Harsh Detergents
A pharmacological assessment of high-charge anionic detergents that disrupt the stratum corneum structure and alter the cutaneous acid mantle.
Drying Clays & Tannin Astringents
An analysis of high-tannin botanical distillates and mineral clay masks that induce superficial protein contraction and excessive surface moisture loss.
Isothiazolinones & Formaldehyde Releasers
A pharmacological assessment of cosmetic biocides—including methylisothiazolinone and formaldehyde donors—responsible for acute allergic contact dermatitis and periorbital eczema.
Lanolin & Wool Wax Alcohols
A clinical evaluation of ovine sebaceous secretions and wool alcohols commonly formulated into intensive barrier ointments, lip balms, and post-procedure salves.
Propylene Glycol & High-Dose Glycols
An analysis of low-molecular-weight glycols utilized as humectants, solvent vehicles, and penetration enhancers in active serums and topical gels.
Photoreactive Citrus Oils & Psoralens
A clinical assessment of cold-pressed Rutaceae citrus extracts containing linear psoralens that induce severe ultraviolet-mediated burns and hyperpigmentation.
Menthol, Camphor & Cooling Additives
A physiological review of sensory cooling monoterpenes and counter-irritants that mimic soothing sensations while triggering neurogenic inflammation and vascular dilation.
Comedogenic Esters & Heavy Waxes
A clinical analysis of low-viscosity branched fatty acid esters and synthetic waxes that penetrate the infundibulum, precipitating microcomedone formation and non-inflammatory congestion.
Distinguishing Irritation from an Active Allergic Response
Irritant contact dermatitis occurs rapidly when an ingredient strips lipids or disrupts pH. Allergic contact dermatitis is a delayed T-cell-mediated reaction taking 24 to 72 hours to manifest. Both require eliminating offending formulations and restoring the lipid matrix.
Screen your skincare shelf for hidden irritants.
Instantly flags fragrance terpenes, drying alcohols, and volatile extracts.