Hello Mr. Luke.
Thank you for the additional picture and additional history. It is definitely much clearer.
The dark blueish coloured spherical lump could be an external thrombosed(clotted) hemorrhoid? from the appearance. The only reason why I cannot be definitive about it is because a thrombosed external hemorrhoid will be very painful when it develops. The dark blue colour can indicate venous blood.
Initial management of a thrombosed hemorrhoid is surgical evacuation of the hemorrhoid with excision of the skin overlying the thrombosed hemorrhoid which produces immediate relief. This is usually done within 72 hours when the patient presents with acute pain. After 72 hours, evacuation is generally not required.
You should use stool softeners, and sitz baths, as mentioned earlier, which provide adequate relief until spontaneous resolution occurs.
Some surgeons advocate that patients with thrombosed external hemorrhoids should undergo excision of the hemorrhoids to prevent recurrent thrombosis. However whether it is required in your case can be decided based on the status of your hemorrhoids. This will require a per rectal examination. So I suggest you consult a general surgeon in this regard and discuss whether surgical intervention is required or not.
I hope this was helpful.