Hello, Thanks for writing to Health Care magic, I am Dr , Muhammad Ahmad , I have read your question closely, I understand your concern and will be helping you with your health related problem. I believe you do have inflammation in your scalp which shampoo some how suppresses and it gets back when you stop using it, it would suggest you not to panic and just get a detailled checkup with a dermatologist , do not self medicate yourself untill the doctor asks you to use a specific medcation or a medicated shampoo. Sometimes it s the fungus effecting our scalp and needs an antifungal shampoo to cure it, but this can only be corrected if a proper diagnosis is made by a doctor. I hope this answered your question, If you have more queries I am happy to answer you. Regards. Dr.Muhammad Ahmad