Hello, Thank you for posting your query on HCM. Since you have not mentioned relevant history like age, duration of condition, use of medications(oral and creams)/cosmetics/alternative medicines etc it is difficult to reach definitive diagnosis without proper examination. From your description, the most probable condition you may be suffering from is acne vulgaris (pimples)/acneiform eruptions which can occur at any sites of your body including your buttocks. Acne/Acneiform eruption is common condition due to inflammation of your oil-producing glands(sebaceous glands) and pretty amenable to treatment. Firstly, avoid any ayurvedic/homeopathic medicines/powders if your currently on them. Avoid use of talcum powder and moisturizers in those areas. Secondly, start taking oral antibiotics like Doxycycline/Azithromycin and solution containing clindamycin twice a day and a gel containing benzoyl peroxide /adapalene at bedtime. You may also add a soap/ containing tea-tree oil or benzoyl peroxide. Hope this will take care of your problems. Wish you best of health. Take care