It sounds like you might be experiencing a mild skin reaction after bathing, which could be due to irritation from water temperature, soap, or sensitivity to certain bath products. This condition is sometimes called "aquagenic pruritus" or a mild contact dermatitis, where small itchy bumps appear but resolve quickly.

• Consider if you recently changed soaps, detergents, or bath additives, as these can cause temporary irritation.
• Using lukewarm water instead of hot water and switching to fragrance-free, gentle cleansers may help reduce symptoms.
• Applying a moisturizer immediately after bathing can soothe the skin and prevent dryness that might trigger itching.

If the pimples or itching worsen, persist longer, or are accompanied by other symptoms like swelling or spreading rash, it would be best to consult a dermatologist for a thorough evaluation and tailored treatment. They can also check for any underlying allergies or skin conditions that might need specific care.To narrow down potential causes, we will need some more information.I understand that after bathing, you're experiencing small pimples with slight itching that disappears after a few minutes. To help me understand better, could you please share your age and gender?