A heat rash does not have any pus in the pimples. It is likely that the diagnosis of a heat rash is incorrect. It is possible that your son has scabies. You have tried using Tetmasol soap which is one kind of scabies treatment without any success. It would be best to take your son to see a dermatologist so that a definite diagnosis can be made of his skin rash and then the correct treatment can be given.
The information provided does not constitute a diagnosis of your condition. You should consult a medical practitioner or other appropriate health care professional for a physical exmanication, diagnosis and formal
advice. Health24 and the expert accept no responsibility or liability for any damage or personal harm you may suffer resulting from making use of this content.