Since how long are you having these symptoms ?
Have you seen a dermatologist ?
Any associated facial hairs ?
Any other relevant medical history ?
Size of the lumps ? Are they nodular ?
Are your periods normal ,regular ?
Are these lesions related to the timing of the period ??
Based upon your history and description of the lesion this sounds to be acne .Usually antibiotic like doxycycline needs to be prescribed initially in cases of acne . Also topical medicines like clindamycin may also be required . In severe cases topical Isotretinoin may also be prescribed .Eat a healthy diet .Fresh green leafy vegetables .Drink plenty of water .Water hydrate the skin and is helpful .You should be seen by a dermatologist for a proper evaluation and treatment .
Hope this helps
Ideally a refferal should be considered since you are having a chronic history of this problem .