Hi, You gave history of papular eruption that are severly itchy. And the lesion become more pronounced after scratching. Itchiness is increased after hot water bath. This much history might suggest that the lesions would be prurigo simplex. Any other family members do not have such lesions. You did not say the fact thatthe lesions are itchy more at night. This rules out the possibility of scabies. Prurigo simplex may due to some cause like allergens or irritants. You consult dermatologist for firm diagnosis and its cause. You may take antihistaminic like levocetirizine and steroid in tappering dose. Apply mild steroid cream. I hope you hot my answer. Thanks. Dr. Ilyas Patel MD