Detailed answer

Trichostasis spinulosa is a condition where there are multiple small hairs trapped within a dilated hair follicle. It is not caused by allergies to skincare products. Allergic reactions to skincare products usually manifest as redness, itching, or rashes on the skin surface, not within the hair follicles. Trichostasis spinulosa is thought to be caused by an abnormality in the hair growth cycle rather than allergens. If you suspect you have trichostasis spinulosa or any other hair or skin condition, it is recommended to consult with a dermatologist for proper diagnosis and treatment.