Hello and Welcome to ‘Ask A Doctor’ service.
I have reviewed your query and here is my advice.
As per your complain eruption of recurring bumps all over the legs which occur after bathing can be most probably due to
Contact Dermatitis.
CONTACT DERMATITIS that is an
allergic reaction which occurs when skin comes in contact with certain agents that your body is allergic to like skin cosmetics, detergents, soaps, fragrances,leather, latex, etc..
You needs to consult an Allergist or an Emergency room and get evaluated and a thorough clinical evaluation and investigations like blood tests to rule out allergies and infection, micorscopic examination of scrapings from lesion can help..
As of now you can take anti allergics like
benadryl for relieving itching and do cool compresses over bumps..
Apply
Caladryl lotion
Use hypoallergic soap and detergents..
Hope I have answered your query. Let me know if I can assist you further.
Regards,
Dr. Honey Arora