As there are brown dots on paper when you wipe him; it is likely to be occult blood from GIT of son.
Most common cause for it is helminthiasis
Have you ever dewormed him? If not, please go ahead. Tab Albendazole 400 mg once can be used.
Other causes for occult blood are -
Polyp, Pediatric Dehydration
,Pediatric Foreign Body Ingestion,Pediatric Gastroenteritis
,Gastrointestinal Foreign Bodies,Hemolytic Uremic Syndrome
,Inflammatory Bowel Disease
, anal fissures and fistula.
for getting done occult blood test.
For eczema, along with creams take following measures-
1] Daily bathing with adding antiseptics twice a week.
2] Cover your child in the soap substitute (eg. Emulsifying Ointment) before getting in the bath and then limit the bath time to the time it takes to wash off the substitute. Pat the skin dry with a soft towel as rubbing may irritate the skin.
3] Use emollients or moisturizers to keep your toddler or baby eczema skin soft and moist. Moisturisers should be applied at least once a day, usually after bathing, but I often suggest to also apply the moisturizers at least four times a day. If the skin is very dry, you can apply every hour. As you are using a steroid cream as well, wait at least 10 - 20 minutes after applying the steroid cream before applying the emollient / moisturizer.
4] You can use 2% ketoconazole
shampoo at least twice a week.