Thank you for your question on ehealthforum.com
As you rightly pointed out, your description of lumps suggest that they are related to hygiene. Folliculitis is an infection of hair follicles and can happen in unhygienic conditions associated with heat and humidity. However, it is also essential to rule out infection like genital herpes. As it is not possible to ascertain the diagnosis on internet, it is advisable to consult your doctor for examination and treatment. Thank you.