Hello..your problem seems to be papular urticaria with eczematous changes due to constant itching. The main solution is to keep yourself away from insects and mites, this can be done by wearing full sleeves clothes, applying mosquito repellant and use of net at night time especially applicable for your baby. You have to take tab levocetrizine 5 mg daily at night time so that u dont scratch the lesions as it will increase the dermatitis. apply topical mometasone cream over the lesions twice daily for 3 weeks. And after that with all the precautions mentioned your problem will be solved.