I have lumps all over my testicles they are pimple sized some are skin coloured some are white thet are very itchy. what could this be?

Here are some...: The lumps you described very likely represents a developing presence of various-sized sebaceous cysts and itchy white pimple-sized lesion could be either razed irritating hair follicles or a form of lichen sclerosus or psoriasis. Nonetheless, without a direct look, it's hard to give definitive right Dx. So, seek professional evaluation & counseling timely.