That sounds uncomfortable—and potentially something that should be checked, depending on how it looks and how he feels.
“Red lines of bumps all over” can come from a few different things, ranging from mild to urgent, for example:
- Allergic reaction / hives (urticaria) – often itchy, raised, can appear in lines or patches and move around
- Contact dermatitis – reaction to something touching the skin (soap, detergent, plants, clothing)
- Insect bites – sometimes appear in clusters or lines
- Scabies – very itchy, often worse at night, can look like small bumps in lines or tracks
- Skin infection or inflammation
- Less commonly, other conditions that need medical assessment
A few important questions that would help narrow it down:
- Is it itchy, painful, or neither?
- Did it appear suddenly or gradually?
- Any new foods, medicines, soaps, detergents, or travel recently?
- Is it on hands, wrists, waist, groin, or between fingers?
- Does he have fever, swelling of lips/face, or trouble breathing?
When to seek urgent care (important)
Go urgently or seek emergency help if he has:
- Trouble breathing, wheezing, or throat tightness
- Swelling of face, lips, or tongue
- Rapidly spreading rash with fever
- Severe pain or feeling very unwell
What you can do right now
- Avoid any new soaps, creams, or chemicals
- Don’t scratch (can worsen or infect it)
- Cool compresses may help itching
- If it seems like an allergic rash, an over-the-counter antihistamine (like cetirizine/loratadine) may help—but only if he can take them safely
If you want, you can describe:
- where exactly it is
- whether it’s itchy or painful
- or even what it looks like more closely (tiny bumps, welts, blister-like, etc.)
That would help me guide you more accurately on what it might be and what to do next.
