It could be almost anything and it depends on where they are.
signs of poor hygiene
Vesicular Exema
either something you are allergic to or something very hot like grease
It causes hard, painful bumps under the skin that are deposits of calcium
Tiny white bumps on the face can be a condition called milia. These bumps can appear at age. There are harmless.
This could be a swollen lymphnode or a bundle of nerves.
In my experience bumps on the head after consuming alcohol is usually caused by stumbline or falling and hitting your head on a hard surface or corner or toilet.
The only way to know for sure what the hard pus and blood filled bumps on your inner thighs are is to visit a doctor. They could possible be boils or ingrown hairs.
Those are seeds that's are stuck in your pours . That's why it causes a bump.
i have red bumps on my neck and when i press down it itches. The bumps are hard and looks like mosquito bumps is this scapies?
The person is vomiting blood or coughing up blood, there are tender, swollen, bruised areas or hard bumps on the body and the person is confused, faint, drowsy or unconscious.
Lots of reasons. You could have injured one, strain, sprain, torn or bruised it. Or, you could have had a workout and you are noticing the increased bloodflow that causes them to be a little swollen. This will go away after a short while.