The short answer
A well-fitted chastity cage should not hurt. It can feel strange, restrictive or frustrating, but sharp pain, numbness or a change in colour are not normal, and they mean the cage comes off. Most early discomfort comes from the size, not from the idea of wearing one.
This guide is general information from people who wear cages, not medical advice. If anything here does not match what your body is telling you, your body wins.
What is normal
A feeling of pressure at night. Erections while you sleep push against the shell, and it can wake you. This usually eases after the first week or so.
Being aware of it. Sitting, bending and walking feel different for a few days, and then they stop feeling like anything much.
Mild marks on the skin. A faint line from the ring that fades within an hour of taking the cage off is normal. And frustration: for many people, that part is the point.
What is not normal
Sharp or burning pain. Numbness or tingling. Skin that is cold, pale, blue or dark. Swelling that does not go down, blisters, cuts or a rash. Difficulty passing water.
Any of these means unlock straight away, whatever day it is and whatever you agreed with anybody. You do not need anyone's permission to take a cage off for your health. If it does not clear quickly once it is off, see a doctor or call NHS 111.
Why it hurts, and what fixes it
The ring is too tight. This is the commonest cause, and the answer is to go up a size. As a rough check, a finger should be able to slip between the ring and the skin.
The cage is too short, so pressure builds at the tip: try a longer shell. Rough edges or a hard material can rub too; plastic or resin is kinder than metal while you learn.
No break. Skin needs time to recover, so if you are new, unlock and wash every day. And hygiene: moisture and soap left on the skin cause rashes, so rinse well and dry fully.
A sensible way to build up
Start with an hour or two while you are awake. Move to a full day, then to a night. Take a short break every day to wash and check the skin, and keep a spare ring size to hand so a pinch can be fixed the same day.
Write down what you notice. One line in the evening, what rubbed and when, shows within a week whether the problem is the ring, the shell or simply that it is new.
Common questions
Should a chastity cage be painful? No. Discomfort that is only being aware of the device is normal. Pain is not.
Why does it hurt at night? Usually because erections press against the shell, or because the ring is a little too tight. A longer shell and a better fit help. How long does it feel strange? Most people settle within a week or two.
When should I see a doctor? If numbness, a change in colour, swelling, blisters or pain do not clear shortly after you take the cage off.
A cage can feel strange. It should not hurt. When it does, take it off, look at the fit, and try again another day.
Erik