Eyelash are not a one-size-fits-all product not for everyone either. Everybody react differently to eyelash extension products ,mostly, if you have sensitive eyes or are affected by allergies, there is a lash product for you, but extensions may not be it. Contraindications for eyelash extensions,Skin Condition around eye area (Such as Eczema,Psoriasis, Dermatitis ) on junctivitis Recent eye infection Eye Blepharitis Alopecia Corneal Disease Dry Alopecia Trichotillomania Hordeolum/ Styes Hay Fever Watery Cataracts Diabetic Retinopathy Eye Syndrome Glaucoma . Any eye surgery (Within the last 6 months)